mirror of
https://github.com/Fishwaldo/Star64_linux.git
synced 2025-06-22 14:41:27 +00:00
powerpc: Remaining 64-bit Book3E support
This contains all the bits that didn't fit in previous patches :-) This includes the actual exception handlers assembly, the changes to the kernel entry, other misc bits and wiring it all up in Kconfig. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
parent
32a74949b7
commit
2d27cfd328
12 changed files with 993 additions and 24 deletions
|
|
@ -472,7 +472,7 @@ config PPC_16K_PAGES
|
||||||
bool "16k page size" if 44x
|
bool "16k page size" if 44x
|
||||||
|
|
||||||
config PPC_64K_PAGES
|
config PPC_64K_PAGES
|
||||||
bool "64k page size" if 44x || PPC_STD_MMU_64
|
bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
|
||||||
select PPC_HAS_HASH_64K if PPC_STD_MMU_64
|
select PPC_HAS_HASH_64K if PPC_STD_MMU_64
|
||||||
|
|
||||||
config PPC_256K_PAGES
|
config PPC_256K_PAGES
|
||||||
|
|
|
||||||
|
|
@ -49,8 +49,13 @@ extern void iseries_handle_interrupts(void);
|
||||||
#define raw_irqs_disabled() (local_get_flags() == 0)
|
#define raw_irqs_disabled() (local_get_flags() == 0)
|
||||||
#define raw_irqs_disabled_flags(flags) ((flags) == 0)
|
#define raw_irqs_disabled_flags(flags) ((flags) == 0)
|
||||||
|
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
#define __hard_irq_enable() __asm__ __volatile__("wrteei 1": : :"memory");
|
||||||
|
#define __hard_irq_disable() __asm__ __volatile__("wrteei 0": : :"memory");
|
||||||
|
#else
|
||||||
#define __hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1)
|
#define __hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1)
|
||||||
#define __hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1)
|
#define __hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1)
|
||||||
|
#endif
|
||||||
|
|
||||||
#define hard_irq_disable() \
|
#define hard_irq_disable() \
|
||||||
do { \
|
do { \
|
||||||
|
|
|
||||||
|
|
@ -153,6 +153,7 @@ extern void arch_send_call_function_ipi(cpumask_t mask);
|
||||||
* 64-bit but defining them all here doesn't harm
|
* 64-bit but defining them all here doesn't harm
|
||||||
*/
|
*/
|
||||||
extern void generic_secondary_smp_init(void);
|
extern void generic_secondary_smp_init(void);
|
||||||
|
extern void generic_secondary_thread_init(void);
|
||||||
extern unsigned long __secondary_hold_spinloop;
|
extern unsigned long __secondary_hold_spinloop;
|
||||||
extern unsigned long __secondary_hold_acknowledge;
|
extern unsigned long __secondary_hold_acknowledge;
|
||||||
extern char __secondary_hold;
|
extern char __secondary_hold;
|
||||||
|
|
|
||||||
|
|
@ -33,10 +33,10 @@ obj-y := cputable.o ptrace.o syscalls.o \
|
||||||
obj-y += vdso32/
|
obj-y += vdso32/
|
||||||
obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \
|
obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \
|
||||||
signal_64.o ptrace32.o \
|
signal_64.o ptrace32.o \
|
||||||
paca.o cpu_setup_ppc970.o \
|
paca.o nvram_64.o firmware.o
|
||||||
cpu_setup_pa6t.o \
|
obj-$(CONFIG_PPC_BOOK3S_64) += cpu_setup_ppc970.o cpu_setup_pa6t.o
|
||||||
firmware.o nvram_64.o
|
|
||||||
obj64-$(CONFIG_RELOCATABLE) += reloc_64.o
|
obj64-$(CONFIG_RELOCATABLE) += reloc_64.o
|
||||||
|
obj-$(CONFIG_PPC_BOOK3E_64) += exceptions-64e.o
|
||||||
obj-$(CONFIG_PPC64) += vdso64/
|
obj-$(CONFIG_PPC64) += vdso64/
|
||||||
obj-$(CONFIG_ALTIVEC) += vecemu.o
|
obj-$(CONFIG_ALTIVEC) += vecemu.o
|
||||||
obj-$(CONFIG_PPC_970_NAP) += idle_power4.o
|
obj-$(CONFIG_PPC_970_NAP) += idle_power4.o
|
||||||
|
|
@ -63,8 +63,8 @@ obj-$(CONFIG_MODULES) += module.o module_$(CONFIG_WORD_SIZE).o
|
||||||
obj-$(CONFIG_44x) += cpu_setup_44x.o
|
obj-$(CONFIG_44x) += cpu_setup_44x.o
|
||||||
obj-$(CONFIG_FSL_BOOKE) += cpu_setup_fsl_booke.o dbell.o
|
obj-$(CONFIG_FSL_BOOKE) += cpu_setup_fsl_booke.o dbell.o
|
||||||
|
|
||||||
extra-$(CONFIG_PPC_STD_MMU) := head_32.o
|
extra-y := head_$(CONFIG_WORD_SIZE).o
|
||||||
extra-$(CONFIG_PPC64) := head_64.o
|
extra-$(CONFIG_PPC_BOOK3E_32) := head_new_booke.o
|
||||||
extra-$(CONFIG_40x) := head_40x.o
|
extra-$(CONFIG_40x) := head_40x.o
|
||||||
extra-$(CONFIG_44x) := head_44x.o
|
extra-$(CONFIG_44x) := head_44x.o
|
||||||
extra-$(CONFIG_FSL_BOOKE) := head_fsl_booke.o
|
extra-$(CONFIG_FSL_BOOKE) := head_fsl_booke.o
|
||||||
|
|
|
||||||
|
|
@ -93,7 +93,7 @@ extern void __restore_cpu_power7(void);
|
||||||
PPC_FEATURE_BOOKE)
|
PPC_FEATURE_BOOKE)
|
||||||
|
|
||||||
static struct cpu_spec __initdata cpu_specs[] = {
|
static struct cpu_spec __initdata cpu_specs[] = {
|
||||||
#ifdef CONFIG_PPC64
|
#ifdef CONFIG_PPC_BOOK3S_64
|
||||||
{ /* Power3 */
|
{ /* Power3 */
|
||||||
.pvr_mask = 0xffff0000,
|
.pvr_mask = 0xffff0000,
|
||||||
.pvr_value = 0x00400000,
|
.pvr_value = 0x00400000,
|
||||||
|
|
@ -508,7 +508,30 @@ static struct cpu_spec __initdata cpu_specs[] = {
|
||||||
.machine_check = machine_check_generic,
|
.machine_check = machine_check_generic,
|
||||||
.platform = "power4",
|
.platform = "power4",
|
||||||
}
|
}
|
||||||
#endif /* CONFIG_PPC64 */
|
#endif /* CONFIG_PPC_BOOK3S_64 */
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E_64
|
||||||
|
{ /* This is a default entry to get going, to be replaced by
|
||||||
|
* a real one at some stage
|
||||||
|
*/
|
||||||
|
#define CPU_FTRS_BASE_BOOK3E (CPU_FTR_USE_TB | \
|
||||||
|
CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_SMT | \
|
||||||
|
CPU_FTR_NODSISRALIGN | CPU_FTR_NOEXECUTE)
|
||||||
|
.pvr_mask = 0x00000000,
|
||||||
|
.pvr_value = 0x00000000,
|
||||||
|
.cpu_name = "Book3E",
|
||||||
|
.cpu_features = CPU_FTRS_BASE_BOOK3E,
|
||||||
|
.cpu_user_features = COMMON_USER_PPC64,
|
||||||
|
.mmu_features = MMU_FTR_TYPE_3E | MMU_FTR_USE_TLBILX |
|
||||||
|
MMU_FTR_USE_TLBIVAX_BCAST |
|
||||||
|
MMU_FTR_LOCK_BCAST_INVAL,
|
||||||
|
.icache_bsize = 64,
|
||||||
|
.dcache_bsize = 64,
|
||||||
|
.num_pmcs = 0,
|
||||||
|
.machine_check = machine_check_generic,
|
||||||
|
.platform = "power6",
|
||||||
|
},
|
||||||
|
#endif
|
||||||
|
|
||||||
#ifdef CONFIG_PPC32
|
#ifdef CONFIG_PPC32
|
||||||
#if CLASSIC_PPC
|
#if CLASSIC_PPC
|
||||||
{ /* 601 */
|
{ /* 601 */
|
||||||
|
|
|
||||||
|
|
@ -120,9 +120,15 @@ BEGIN_FW_FTR_SECTION
|
||||||
2:
|
2:
|
||||||
END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
|
END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
|
||||||
#endif /* CONFIG_PPC_ISERIES */
|
#endif /* CONFIG_PPC_ISERIES */
|
||||||
|
|
||||||
|
/* Hard enable interrupts */
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
wrteei 1
|
||||||
|
#else
|
||||||
mfmsr r11
|
mfmsr r11
|
||||||
ori r11,r11,MSR_EE
|
ori r11,r11,MSR_EE
|
||||||
mtmsrd r11,1
|
mtmsrd r11,1
|
||||||
|
#endif /* CONFIG_PPC_BOOK3E */
|
||||||
|
|
||||||
#ifdef SHOW_SYSCALLS
|
#ifdef SHOW_SYSCALLS
|
||||||
bl .do_show_syscall
|
bl .do_show_syscall
|
||||||
|
|
@ -168,15 +174,25 @@ syscall_exit:
|
||||||
#endif
|
#endif
|
||||||
clrrdi r12,r1,THREAD_SHIFT
|
clrrdi r12,r1,THREAD_SHIFT
|
||||||
|
|
||||||
/* disable interrupts so current_thread_info()->flags can't change,
|
|
||||||
and so that we don't get interrupted after loading SRR0/1. */
|
|
||||||
ld r8,_MSR(r1)
|
ld r8,_MSR(r1)
|
||||||
|
#ifdef CONFIG_PPC_BOOK3S
|
||||||
|
/* No MSR:RI on BookE */
|
||||||
andi. r10,r8,MSR_RI
|
andi. r10,r8,MSR_RI
|
||||||
beq- unrecov_restore
|
beq- unrecov_restore
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Disable interrupts so current_thread_info()->flags can't change,
|
||||||
|
* and so that we don't get interrupted after loading SRR0/1.
|
||||||
|
*/
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
wrteei 0
|
||||||
|
#else
|
||||||
mfmsr r10
|
mfmsr r10
|
||||||
rldicl r10,r10,48,1
|
rldicl r10,r10,48,1
|
||||||
rotldi r10,r10,16
|
rotldi r10,r10,16
|
||||||
mtmsrd r10,1
|
mtmsrd r10,1
|
||||||
|
#endif /* CONFIG_PPC_BOOK3E */
|
||||||
|
|
||||||
ld r9,TI_FLAGS(r12)
|
ld r9,TI_FLAGS(r12)
|
||||||
li r11,-_LAST_ERRNO
|
li r11,-_LAST_ERRNO
|
||||||
andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SINGLESTEP|_TIF_USER_WORK_MASK|_TIF_PERSYSCALL_MASK)
|
andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SINGLESTEP|_TIF_USER_WORK_MASK|_TIF_PERSYSCALL_MASK)
|
||||||
|
|
@ -194,9 +210,13 @@ syscall_error_cont:
|
||||||
* userspace and we take an exception after restoring r13,
|
* userspace and we take an exception after restoring r13,
|
||||||
* we end up corrupting the userspace r13 value.
|
* we end up corrupting the userspace r13 value.
|
||||||
*/
|
*/
|
||||||
|
#ifdef CONFIG_PPC_BOOK3S
|
||||||
|
/* No MSR:RI on BookE */
|
||||||
li r12,MSR_RI
|
li r12,MSR_RI
|
||||||
andc r11,r10,r12
|
andc r11,r10,r12
|
||||||
mtmsrd r11,1 /* clear MSR.RI */
|
mtmsrd r11,1 /* clear MSR.RI */
|
||||||
|
#endif /* CONFIG_PPC_BOOK3S */
|
||||||
|
|
||||||
beq- 1f
|
beq- 1f
|
||||||
ACCOUNT_CPU_USER_EXIT(r11, r12)
|
ACCOUNT_CPU_USER_EXIT(r11, r12)
|
||||||
ld r13,GPR13(r1) /* only restore r13 if returning to usermode */
|
ld r13,GPR13(r1) /* only restore r13 if returning to usermode */
|
||||||
|
|
@ -206,7 +226,7 @@ syscall_error_cont:
|
||||||
mtcr r5
|
mtcr r5
|
||||||
mtspr SPRN_SRR0,r7
|
mtspr SPRN_SRR0,r7
|
||||||
mtspr SPRN_SRR1,r8
|
mtspr SPRN_SRR1,r8
|
||||||
rfid
|
RFI
|
||||||
b . /* prevent speculative execution */
|
b . /* prevent speculative execution */
|
||||||
|
|
||||||
syscall_error:
|
syscall_error:
|
||||||
|
|
@ -276,9 +296,13 @@ syscall_exit_work:
|
||||||
beq .ret_from_except_lite
|
beq .ret_from_except_lite
|
||||||
|
|
||||||
/* Re-enable interrupts */
|
/* Re-enable interrupts */
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
wrteei 1
|
||||||
|
#else
|
||||||
mfmsr r10
|
mfmsr r10
|
||||||
ori r10,r10,MSR_EE
|
ori r10,r10,MSR_EE
|
||||||
mtmsrd r10,1
|
mtmsrd r10,1
|
||||||
|
#endif /* CONFIG_PPC_BOOK3E */
|
||||||
|
|
||||||
bl .save_nvgprs
|
bl .save_nvgprs
|
||||||
addi r3,r1,STACK_FRAME_OVERHEAD
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
|
@ -380,7 +404,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
|
||||||
and. r0,r0,r22
|
and. r0,r0,r22
|
||||||
beq+ 1f
|
beq+ 1f
|
||||||
andc r22,r22,r0
|
andc r22,r22,r0
|
||||||
mtmsrd r22
|
MTMSRD(r22)
|
||||||
isync
|
isync
|
||||||
1: std r20,_NIP(r1)
|
1: std r20,_NIP(r1)
|
||||||
mfcr r23
|
mfcr r23
|
||||||
|
|
@ -399,6 +423,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
|
||||||
std r6,PACACURRENT(r13) /* Set new 'current' */
|
std r6,PACACURRENT(r13) /* Set new 'current' */
|
||||||
|
|
||||||
ld r8,KSP(r4) /* new stack pointer */
|
ld r8,KSP(r4) /* new stack pointer */
|
||||||
|
#ifdef CONFIG_PPC_BOOK3S
|
||||||
BEGIN_FTR_SECTION
|
BEGIN_FTR_SECTION
|
||||||
BEGIN_FTR_SECTION_NESTED(95)
|
BEGIN_FTR_SECTION_NESTED(95)
|
||||||
clrrdi r6,r8,28 /* get its ESID */
|
clrrdi r6,r8,28 /* get its ESID */
|
||||||
|
|
@ -445,8 +470,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_1T_SEGMENT)
|
||||||
slbie r6 /* Workaround POWER5 < DD2.1 issue */
|
slbie r6 /* Workaround POWER5 < DD2.1 issue */
|
||||||
slbmte r7,r0
|
slbmte r7,r0
|
||||||
isync
|
isync
|
||||||
|
|
||||||
2:
|
2:
|
||||||
|
#endif /* !CONFIG_PPC_BOOK3S */
|
||||||
|
|
||||||
clrrdi r7,r8,THREAD_SHIFT /* base of new stack */
|
clrrdi r7,r8,THREAD_SHIFT /* base of new stack */
|
||||||
/* Note: this uses SWITCH_FRAME_SIZE rather than INT_FRAME_SIZE
|
/* Note: this uses SWITCH_FRAME_SIZE rather than INT_FRAME_SIZE
|
||||||
because we don't need to leave the 288-byte ABI gap at the
|
because we don't need to leave the 288-byte ABI gap at the
|
||||||
|
|
@ -490,10 +516,14 @@ _GLOBAL(ret_from_except_lite)
|
||||||
* can't change between when we test it and when we return
|
* can't change between when we test it and when we return
|
||||||
* from the interrupt.
|
* from the interrupt.
|
||||||
*/
|
*/
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
wrteei 0
|
||||||
|
#else
|
||||||
mfmsr r10 /* Get current interrupt state */
|
mfmsr r10 /* Get current interrupt state */
|
||||||
rldicl r9,r10,48,1 /* clear MSR_EE */
|
rldicl r9,r10,48,1 /* clear MSR_EE */
|
||||||
rotldi r9,r9,16
|
rotldi r9,r9,16
|
||||||
mtmsrd r9,1 /* Update machine state */
|
mtmsrd r9,1 /* Update machine state */
|
||||||
|
#endif /* CONFIG_PPC_BOOK3E */
|
||||||
|
|
||||||
#ifdef CONFIG_PREEMPT
|
#ifdef CONFIG_PREEMPT
|
||||||
clrrdi r9,r1,THREAD_SHIFT /* current_thread_info() */
|
clrrdi r9,r1,THREAD_SHIFT /* current_thread_info() */
|
||||||
|
|
@ -540,6 +570,9 @@ ALT_FW_FTR_SECTION_END_IFCLR(FW_FEATURE_ISERIES)
|
||||||
rldicl r4,r3,49,63 /* r0 = (r3 >> 15) & 1 */
|
rldicl r4,r3,49,63 /* r0 = (r3 >> 15) & 1 */
|
||||||
stb r4,PACAHARDIRQEN(r13)
|
stb r4,PACAHARDIRQEN(r13)
|
||||||
|
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
b .exception_return_book3e
|
||||||
|
#else
|
||||||
ld r4,_CTR(r1)
|
ld r4,_CTR(r1)
|
||||||
ld r0,_LINK(r1)
|
ld r0,_LINK(r1)
|
||||||
mtctr r4
|
mtctr r4
|
||||||
|
|
@ -588,6 +621,8 @@ ALT_FW_FTR_SECTION_END_IFCLR(FW_FEATURE_ISERIES)
|
||||||
rfid
|
rfid
|
||||||
b . /* prevent speculative execution */
|
b . /* prevent speculative execution */
|
||||||
|
|
||||||
|
#endif /* CONFIG_PPC_BOOK3E */
|
||||||
|
|
||||||
iseries_check_pending_irqs:
|
iseries_check_pending_irqs:
|
||||||
#ifdef CONFIG_PPC_ISERIES
|
#ifdef CONFIG_PPC_ISERIES
|
||||||
ld r5,SOFTE(r1)
|
ld r5,SOFTE(r1)
|
||||||
|
|
@ -638,6 +673,11 @@ do_work:
|
||||||
li r0,1
|
li r0,1
|
||||||
stb r0,PACASOFTIRQEN(r13)
|
stb r0,PACASOFTIRQEN(r13)
|
||||||
stb r0,PACAHARDIRQEN(r13)
|
stb r0,PACAHARDIRQEN(r13)
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
wrteei 1
|
||||||
|
bl .preempt_schedule
|
||||||
|
wrteei 0
|
||||||
|
#else
|
||||||
ori r10,r10,MSR_EE
|
ori r10,r10,MSR_EE
|
||||||
mtmsrd r10,1 /* reenable interrupts */
|
mtmsrd r10,1 /* reenable interrupts */
|
||||||
bl .preempt_schedule
|
bl .preempt_schedule
|
||||||
|
|
@ -646,6 +686,7 @@ do_work:
|
||||||
rldicl r10,r10,48,1 /* disable interrupts again */
|
rldicl r10,r10,48,1 /* disable interrupts again */
|
||||||
rotldi r10,r10,16
|
rotldi r10,r10,16
|
||||||
mtmsrd r10,1
|
mtmsrd r10,1
|
||||||
|
#endif /* CONFIG_PPC_BOOK3E */
|
||||||
ld r4,TI_FLAGS(r9)
|
ld r4,TI_FLAGS(r9)
|
||||||
andi. r0,r4,_TIF_NEED_RESCHED
|
andi. r0,r4,_TIF_NEED_RESCHED
|
||||||
bne 1b
|
bne 1b
|
||||||
|
|
@ -654,8 +695,12 @@ do_work:
|
||||||
user_work:
|
user_work:
|
||||||
#endif
|
#endif
|
||||||
/* Enable interrupts */
|
/* Enable interrupts */
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
wrteei 1
|
||||||
|
#else
|
||||||
ori r10,r10,MSR_EE
|
ori r10,r10,MSR_EE
|
||||||
mtmsrd r10,1
|
mtmsrd r10,1
|
||||||
|
#endif /* CONFIG_PPC_BOOK3E */
|
||||||
|
|
||||||
andi. r0,r4,_TIF_NEED_RESCHED
|
andi. r0,r4,_TIF_NEED_RESCHED
|
||||||
beq 1f
|
beq 1f
|
||||||
|
|
@ -837,6 +882,10 @@ _GLOBAL(enter_prom)
|
||||||
|
|
||||||
/* Switch MSR to 32 bits mode
|
/* Switch MSR to 32 bits mode
|
||||||
*/
|
*/
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
rlwinm r11,r11,0,1,31
|
||||||
|
mtmsr r11
|
||||||
|
#else /* CONFIG_PPC_BOOK3E */
|
||||||
mfmsr r11
|
mfmsr r11
|
||||||
li r12,1
|
li r12,1
|
||||||
rldicr r12,r12,MSR_SF_LG,(63-MSR_SF_LG)
|
rldicr r12,r12,MSR_SF_LG,(63-MSR_SF_LG)
|
||||||
|
|
@ -845,6 +894,7 @@ _GLOBAL(enter_prom)
|
||||||
rldicr r12,r12,MSR_ISF_LG,(63-MSR_ISF_LG)
|
rldicr r12,r12,MSR_ISF_LG,(63-MSR_ISF_LG)
|
||||||
andc r11,r11,r12
|
andc r11,r11,r12
|
||||||
mtmsrd r11
|
mtmsrd r11
|
||||||
|
#endif /* CONFIG_PPC_BOOK3E */
|
||||||
isync
|
isync
|
||||||
|
|
||||||
/* Enter PROM here... */
|
/* Enter PROM here... */
|
||||||
|
|
|
||||||
784
arch/powerpc/kernel/exceptions-64e.S
Normal file
784
arch/powerpc/kernel/exceptions-64e.S
Normal file
|
|
@ -0,0 +1,784 @@
|
||||||
|
/*
|
||||||
|
* Boot code and exception vectors for Book3E processors
|
||||||
|
*
|
||||||
|
* Copyright (C) 2007 Ben. Herrenschmidt (benh@kernel.crashing.org), IBM Corp.
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU General Public License
|
||||||
|
* as published by the Free Software Foundation; either version
|
||||||
|
* 2 of the License, or (at your option) any later version.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/threads.h>
|
||||||
|
#include <asm/reg.h>
|
||||||
|
#include <asm/page.h>
|
||||||
|
#include <asm/ppc_asm.h>
|
||||||
|
#include <asm/asm-offsets.h>
|
||||||
|
#include <asm/cputable.h>
|
||||||
|
#include <asm/setup.h>
|
||||||
|
#include <asm/thread_info.h>
|
||||||
|
#include <asm/reg.h>
|
||||||
|
#include <asm/exception-64e.h>
|
||||||
|
#include <asm/bug.h>
|
||||||
|
#include <asm/irqflags.h>
|
||||||
|
#include <asm/ptrace.h>
|
||||||
|
#include <asm/ppc-opcode.h>
|
||||||
|
#include <asm/mmu.h>
|
||||||
|
|
||||||
|
/* XXX This will ultimately add space for a special exception save
|
||||||
|
* structure used to save things like SRR0/SRR1, SPRGs, MAS, etc...
|
||||||
|
* when taking special interrupts. For now we don't support that,
|
||||||
|
* special interrupts from within a non-standard level will probably
|
||||||
|
* blow you up
|
||||||
|
*/
|
||||||
|
#define SPECIAL_EXC_FRAME_SIZE INT_FRAME_SIZE
|
||||||
|
|
||||||
|
/* Exception prolog code for all exceptions */
|
||||||
|
#define EXCEPTION_PROLOG(n, type, addition) \
|
||||||
|
mtspr SPRN_SPRG_##type##_SCRATCH,r13; /* get spare registers */ \
|
||||||
|
mfspr r13,SPRN_SPRG_PACA; /* get PACA */ \
|
||||||
|
std r10,PACA_EX##type+EX_R10(r13); \
|
||||||
|
std r11,PACA_EX##type+EX_R11(r13); \
|
||||||
|
mfcr r10; /* save CR */ \
|
||||||
|
addition; /* additional code for that exc. */ \
|
||||||
|
std r1,PACA_EX##type+EX_R1(r13); /* save old r1 in the PACA */ \
|
||||||
|
stw r10,PACA_EX##type+EX_CR(r13); /* save old CR in the PACA */ \
|
||||||
|
mfspr r11,SPRN_##type##_SRR1;/* what are we coming from */ \
|
||||||
|
type##_SET_KSTACK; /* get special stack if necessary */\
|
||||||
|
andi. r10,r11,MSR_PR; /* save stack pointer */ \
|
||||||
|
beq 1f; /* branch around if supervisor */ \
|
||||||
|
ld r1,PACAKSAVE(r13); /* get kernel stack coming from usr */\
|
||||||
|
1: cmpdi cr1,r1,0; /* check if SP makes sense */ \
|
||||||
|
bge- cr1,exc_##n##_bad_stack;/* bad stack (TODO: out of line) */ \
|
||||||
|
mfspr r10,SPRN_##type##_SRR0; /* read SRR0 before touching stack */
|
||||||
|
|
||||||
|
/* Exception type-specific macros */
|
||||||
|
#define GEN_SET_KSTACK \
|
||||||
|
subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */
|
||||||
|
#define SPRN_GEN_SRR0 SPRN_SRR0
|
||||||
|
#define SPRN_GEN_SRR1 SPRN_SRR1
|
||||||
|
|
||||||
|
#define CRIT_SET_KSTACK \
|
||||||
|
ld r1,PACA_CRIT_STACK(r13); \
|
||||||
|
subi r1,r1,SPECIAL_EXC_FRAME_SIZE;
|
||||||
|
#define SPRN_CRIT_SRR0 SPRN_CSRR0
|
||||||
|
#define SPRN_CRIT_SRR1 SPRN_CSRR1
|
||||||
|
|
||||||
|
#define DBG_SET_KSTACK \
|
||||||
|
ld r1,PACA_DBG_STACK(r13); \
|
||||||
|
subi r1,r1,SPECIAL_EXC_FRAME_SIZE;
|
||||||
|
#define SPRN_DBG_SRR0 SPRN_DSRR0
|
||||||
|
#define SPRN_DBG_SRR1 SPRN_DSRR1
|
||||||
|
|
||||||
|
#define MC_SET_KSTACK \
|
||||||
|
ld r1,PACA_MC_STACK(r13); \
|
||||||
|
subi r1,r1,SPECIAL_EXC_FRAME_SIZE;
|
||||||
|
#define SPRN_MC_SRR0 SPRN_MCSRR0
|
||||||
|
#define SPRN_MC_SRR1 SPRN_MCSRR1
|
||||||
|
|
||||||
|
#define NORMAL_EXCEPTION_PROLOG(n, addition) \
|
||||||
|
EXCEPTION_PROLOG(n, GEN, addition##_GEN)
|
||||||
|
|
||||||
|
#define CRIT_EXCEPTION_PROLOG(n, addition) \
|
||||||
|
EXCEPTION_PROLOG(n, CRIT, addition##_CRIT)
|
||||||
|
|
||||||
|
#define DBG_EXCEPTION_PROLOG(n, addition) \
|
||||||
|
EXCEPTION_PROLOG(n, DBG, addition##_DBG)
|
||||||
|
|
||||||
|
#define MC_EXCEPTION_PROLOG(n, addition) \
|
||||||
|
EXCEPTION_PROLOG(n, MC, addition##_MC)
|
||||||
|
|
||||||
|
|
||||||
|
/* Variants of the "addition" argument for the prolog
|
||||||
|
*/
|
||||||
|
#define PROLOG_ADDITION_NONE_GEN
|
||||||
|
#define PROLOG_ADDITION_NONE_CRIT
|
||||||
|
#define PROLOG_ADDITION_NONE_DBG
|
||||||
|
#define PROLOG_ADDITION_NONE_MC
|
||||||
|
|
||||||
|
#define PROLOG_ADDITION_MASKABLE_GEN \
|
||||||
|
lbz r11,PACASOFTIRQEN(r13); /* are irqs soft-disabled ? */ \
|
||||||
|
cmpwi cr0,r11,0; /* yes -> go out of line */ \
|
||||||
|
beq masked_interrupt_book3e;
|
||||||
|
|
||||||
|
#define PROLOG_ADDITION_2REGS_GEN \
|
||||||
|
std r14,PACA_EXGEN+EX_R14(r13); \
|
||||||
|
std r15,PACA_EXGEN+EX_R15(r13)
|
||||||
|
|
||||||
|
#define PROLOG_ADDITION_1REG_GEN \
|
||||||
|
std r14,PACA_EXGEN+EX_R14(r13);
|
||||||
|
|
||||||
|
#define PROLOG_ADDITION_2REGS_CRIT \
|
||||||
|
std r14,PACA_EXCRIT+EX_R14(r13); \
|
||||||
|
std r15,PACA_EXCRIT+EX_R15(r13)
|
||||||
|
|
||||||
|
#define PROLOG_ADDITION_2REGS_DBG \
|
||||||
|
std r14,PACA_EXDBG+EX_R14(r13); \
|
||||||
|
std r15,PACA_EXDBG+EX_R15(r13)
|
||||||
|
|
||||||
|
#define PROLOG_ADDITION_2REGS_MC \
|
||||||
|
std r14,PACA_EXMC+EX_R14(r13); \
|
||||||
|
std r15,PACA_EXMC+EX_R15(r13)
|
||||||
|
|
||||||
|
/* Core exception code for all exceptions except TLB misses.
|
||||||
|
* XXX: Needs to make SPRN_SPRG_GEN depend on exception type
|
||||||
|
*/
|
||||||
|
#define EXCEPTION_COMMON(n, excf, ints) \
|
||||||
|
std r0,GPR0(r1); /* save r0 in stackframe */ \
|
||||||
|
std r2,GPR2(r1); /* save r2 in stackframe */ \
|
||||||
|
SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \
|
||||||
|
SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \
|
||||||
|
std r9,GPR9(r1); /* save r9 in stackframe */ \
|
||||||
|
std r10,_NIP(r1); /* save SRR0 to stackframe */ \
|
||||||
|
std r11,_MSR(r1); /* save SRR1 to stackframe */ \
|
||||||
|
ACCOUNT_CPU_USER_ENTRY(r10,r11);/* accounting (uses cr0+eq) */ \
|
||||||
|
ld r3,excf+EX_R10(r13); /* get back r10 */ \
|
||||||
|
ld r4,excf+EX_R11(r13); /* get back r11 */ \
|
||||||
|
mfspr r5,SPRN_SPRG_GEN_SCRATCH;/* get back r13 */ \
|
||||||
|
std r12,GPR12(r1); /* save r12 in stackframe */ \
|
||||||
|
ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \
|
||||||
|
mflr r6; /* save LR in stackframe */ \
|
||||||
|
mfctr r7; /* save CTR in stackframe */ \
|
||||||
|
mfspr r8,SPRN_XER; /* save XER in stackframe */ \
|
||||||
|
ld r9,excf+EX_R1(r13); /* load orig r1 back from PACA */ \
|
||||||
|
lwz r10,excf+EX_CR(r13); /* load orig CR back from PACA */ \
|
||||||
|
lbz r11,PACASOFTIRQEN(r13); /* get current IRQ softe */ \
|
||||||
|
ld r12,exception_marker@toc(r2); \
|
||||||
|
li r0,0; \
|
||||||
|
std r3,GPR10(r1); /* save r10 to stackframe */ \
|
||||||
|
std r4,GPR11(r1); /* save r11 to stackframe */ \
|
||||||
|
std r5,GPR13(r1); /* save it to stackframe */ \
|
||||||
|
std r6,_LINK(r1); \
|
||||||
|
std r7,_CTR(r1); \
|
||||||
|
std r8,_XER(r1); \
|
||||||
|
li r3,(n)+1; /* indicate partial regs in trap */ \
|
||||||
|
std r9,0(r1); /* store stack frame back link */ \
|
||||||
|
std r10,_CCR(r1); /* store orig CR in stackframe */ \
|
||||||
|
std r9,GPR1(r1); /* store stack frame back link */ \
|
||||||
|
std r11,SOFTE(r1); /* and save it to stackframe */ \
|
||||||
|
std r12,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ \
|
||||||
|
std r3,_TRAP(r1); /* set trap number */ \
|
||||||
|
std r0,RESULT(r1); /* clear regs->result */ \
|
||||||
|
ints;
|
||||||
|
|
||||||
|
/* Variants for the "ints" argument */
|
||||||
|
#define INTS_KEEP
|
||||||
|
#define INTS_DISABLE_SOFT \
|
||||||
|
stb r0,PACASOFTIRQEN(r13); /* mark interrupts soft-disabled */ \
|
||||||
|
TRACE_DISABLE_INTS;
|
||||||
|
#define INTS_DISABLE_HARD \
|
||||||
|
stb r0,PACAHARDIRQEN(r13); /* and hard disabled */
|
||||||
|
#define INTS_DISABLE_ALL \
|
||||||
|
INTS_DISABLE_SOFT \
|
||||||
|
INTS_DISABLE_HARD
|
||||||
|
|
||||||
|
/* This is called by exceptions that used INTS_KEEP (that is did not clear
|
||||||
|
* neither soft nor hard IRQ indicators in the PACA. This will restore MSR:EE
|
||||||
|
* to it's previous value
|
||||||
|
*
|
||||||
|
* XXX In the long run, we may want to open-code it in order to separate the
|
||||||
|
* load from the wrtee, thus limiting the latency caused by the dependency
|
||||||
|
* but at this point, I'll favor code clarity until we have a near to final
|
||||||
|
* implementation
|
||||||
|
*/
|
||||||
|
#define INTS_RESTORE_HARD \
|
||||||
|
ld r11,_MSR(r1); \
|
||||||
|
wrtee r11;
|
||||||
|
|
||||||
|
/* XXX FIXME: Restore r14/r15 when necessary */
|
||||||
|
#define BAD_STACK_TRAMPOLINE(n) \
|
||||||
|
exc_##n##_bad_stack: \
|
||||||
|
li r1,(n); /* get exception number */ \
|
||||||
|
sth r1,PACA_TRAP_SAVE(r13); /* store trap */ \
|
||||||
|
b bad_stack_book3e; /* bad stack error */
|
||||||
|
|
||||||
|
#define EXCEPTION_STUB(loc, label) \
|
||||||
|
. = interrupt_base_book3e + loc; \
|
||||||
|
nop; /* To make debug interrupts happy */ \
|
||||||
|
b exc_##label##_book3e;
|
||||||
|
|
||||||
|
#define ACK_NONE(r)
|
||||||
|
#define ACK_DEC(r) \
|
||||||
|
lis r,TSR_DIS@h; \
|
||||||
|
mtspr SPRN_TSR,r
|
||||||
|
#define ACK_FIT(r) \
|
||||||
|
lis r,TSR_FIS@h; \
|
||||||
|
mtspr SPRN_TSR,r
|
||||||
|
|
||||||
|
#define MASKABLE_EXCEPTION(trapnum, label, hdlr, ack) \
|
||||||
|
START_EXCEPTION(label); \
|
||||||
|
NORMAL_EXCEPTION_PROLOG(trapnum, PROLOG_ADDITION_MASKABLE) \
|
||||||
|
EXCEPTION_COMMON(trapnum, PACA_EXGEN, INTS_DISABLE_ALL) \
|
||||||
|
ack(r8); \
|
||||||
|
addi r3,r1,STACK_FRAME_OVERHEAD; \
|
||||||
|
bl hdlr; \
|
||||||
|
b .ret_from_except_lite;
|
||||||
|
|
||||||
|
/* This value is used to mark exception frames on the stack. */
|
||||||
|
.section ".toc","aw"
|
||||||
|
exception_marker:
|
||||||
|
.tc ID_EXC_MARKER[TC],STACK_FRAME_REGS_MARKER
|
||||||
|
|
||||||
|
|
||||||
|
/*
|
||||||
|
* And here we have the exception vectors !
|
||||||
|
*/
|
||||||
|
|
||||||
|
.text
|
||||||
|
.balign 0x1000
|
||||||
|
.globl interrupt_base_book3e
|
||||||
|
interrupt_base_book3e: /* fake trap */
|
||||||
|
/* Note: If real debug exceptions are supported by the HW, the vector
|
||||||
|
* below will have to be patched up to point to an appropriate handler
|
||||||
|
*/
|
||||||
|
EXCEPTION_STUB(0x000, machine_check) /* 0x0200 */
|
||||||
|
EXCEPTION_STUB(0x020, critical_input) /* 0x0580 */
|
||||||
|
EXCEPTION_STUB(0x040, debug_crit) /* 0x0d00 */
|
||||||
|
EXCEPTION_STUB(0x060, data_storage) /* 0x0300 */
|
||||||
|
EXCEPTION_STUB(0x080, instruction_storage) /* 0x0400 */
|
||||||
|
EXCEPTION_STUB(0x0a0, external_input) /* 0x0500 */
|
||||||
|
EXCEPTION_STUB(0x0c0, alignment) /* 0x0600 */
|
||||||
|
EXCEPTION_STUB(0x0e0, program) /* 0x0700 */
|
||||||
|
EXCEPTION_STUB(0x100, fp_unavailable) /* 0x0800 */
|
||||||
|
EXCEPTION_STUB(0x120, system_call) /* 0x0c00 */
|
||||||
|
EXCEPTION_STUB(0x140, ap_unavailable) /* 0x0f20 */
|
||||||
|
EXCEPTION_STUB(0x160, decrementer) /* 0x0900 */
|
||||||
|
EXCEPTION_STUB(0x180, fixed_interval) /* 0x0980 */
|
||||||
|
EXCEPTION_STUB(0x1a0, watchdog) /* 0x09f0 */
|
||||||
|
EXCEPTION_STUB(0x1c0, data_tlb_miss)
|
||||||
|
EXCEPTION_STUB(0x1e0, instruction_tlb_miss)
|
||||||
|
|
||||||
|
#if 0
|
||||||
|
EXCEPTION_STUB(0x280, processor_doorbell)
|
||||||
|
EXCEPTION_STUB(0x220, processor_doorbell_crit)
|
||||||
|
#endif
|
||||||
|
.globl interrupt_end_book3e
|
||||||
|
interrupt_end_book3e:
|
||||||
|
|
||||||
|
/* Critical Input Interrupt */
|
||||||
|
START_EXCEPTION(critical_input);
|
||||||
|
CRIT_EXCEPTION_PROLOG(0x100, PROLOG_ADDITION_NONE)
|
||||||
|
// EXCEPTION_COMMON(0x100, PACA_EXCRIT, INTS_DISABLE_ALL)
|
||||||
|
// bl special_reg_save_crit
|
||||||
|
// addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
// bl .critical_exception
|
||||||
|
// b ret_from_crit_except
|
||||||
|
b .
|
||||||
|
|
||||||
|
/* Machine Check Interrupt */
|
||||||
|
START_EXCEPTION(machine_check);
|
||||||
|
CRIT_EXCEPTION_PROLOG(0x200, PROLOG_ADDITION_NONE)
|
||||||
|
// EXCEPTION_COMMON(0x200, PACA_EXMC, INTS_DISABLE_ALL)
|
||||||
|
// bl special_reg_save_mc
|
||||||
|
// addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
// bl .machine_check_exception
|
||||||
|
// b ret_from_mc_except
|
||||||
|
b .
|
||||||
|
|
||||||
|
/* Data Storage Interrupt */
|
||||||
|
START_EXCEPTION(data_storage)
|
||||||
|
NORMAL_EXCEPTION_PROLOG(0x300, PROLOG_ADDITION_2REGS)
|
||||||
|
mfspr r14,SPRN_DEAR
|
||||||
|
mfspr r15,SPRN_ESR
|
||||||
|
EXCEPTION_COMMON(0x300, PACA_EXGEN, INTS_KEEP)
|
||||||
|
b storage_fault_common
|
||||||
|
|
||||||
|
/* Instruction Storage Interrupt */
|
||||||
|
START_EXCEPTION(instruction_storage);
|
||||||
|
NORMAL_EXCEPTION_PROLOG(0x400, PROLOG_ADDITION_2REGS)
|
||||||
|
li r15,0
|
||||||
|
mr r14,r10
|
||||||
|
EXCEPTION_COMMON(0x400, PACA_EXGEN, INTS_KEEP)
|
||||||
|
b storage_fault_common
|
||||||
|
|
||||||
|
/* External Input Interrupt */
|
||||||
|
MASKABLE_EXCEPTION(0x500, external_input, .do_IRQ, ACK_NONE)
|
||||||
|
|
||||||
|
/* Alignment */
|
||||||
|
START_EXCEPTION(alignment);
|
||||||
|
NORMAL_EXCEPTION_PROLOG(0x600, PROLOG_ADDITION_2REGS)
|
||||||
|
mfspr r14,SPRN_DEAR
|
||||||
|
mfspr r15,SPRN_ESR
|
||||||
|
EXCEPTION_COMMON(0x600, PACA_EXGEN, INTS_KEEP)
|
||||||
|
b alignment_more /* no room, go out of line */
|
||||||
|
|
||||||
|
/* Program Interrupt */
|
||||||
|
START_EXCEPTION(program);
|
||||||
|
NORMAL_EXCEPTION_PROLOG(0x700, PROLOG_ADDITION_1REG)
|
||||||
|
mfspr r14,SPRN_ESR
|
||||||
|
EXCEPTION_COMMON(0x700, PACA_EXGEN, INTS_DISABLE_SOFT)
|
||||||
|
std r14,_DSISR(r1)
|
||||||
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
ld r14,PACA_EXGEN+EX_R14(r13)
|
||||||
|
bl .save_nvgprs
|
||||||
|
INTS_RESTORE_HARD
|
||||||
|
bl .program_check_exception
|
||||||
|
b .ret_from_except
|
||||||
|
|
||||||
|
/* Floating Point Unavailable Interrupt */
|
||||||
|
START_EXCEPTION(fp_unavailable);
|
||||||
|
NORMAL_EXCEPTION_PROLOG(0x800, PROLOG_ADDITION_NONE)
|
||||||
|
/* we can probably do a shorter exception entry for that one... */
|
||||||
|
EXCEPTION_COMMON(0x800, PACA_EXGEN, INTS_KEEP)
|
||||||
|
bne 1f /* if from user, just load it up */
|
||||||
|
bl .save_nvgprs
|
||||||
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
INTS_RESTORE_HARD
|
||||||
|
bl .kernel_fp_unavailable_exception
|
||||||
|
BUG_OPCODE
|
||||||
|
1: ld r12,_MSR(r1)
|
||||||
|
bl .load_up_fpu
|
||||||
|
b fast_exception_return
|
||||||
|
|
||||||
|
/* Decrementer Interrupt */
|
||||||
|
MASKABLE_EXCEPTION(0x900, decrementer, .timer_interrupt, ACK_DEC)
|
||||||
|
|
||||||
|
/* Fixed Interval Timer Interrupt */
|
||||||
|
MASKABLE_EXCEPTION(0x980, fixed_interval, .unknown_exception, ACK_FIT)
|
||||||
|
|
||||||
|
/* Watchdog Timer Interrupt */
|
||||||
|
START_EXCEPTION(watchdog);
|
||||||
|
CRIT_EXCEPTION_PROLOG(0x9f0, PROLOG_ADDITION_NONE)
|
||||||
|
// EXCEPTION_COMMON(0x9f0, PACA_EXCRIT, INTS_DISABLE_ALL)
|
||||||
|
// bl special_reg_save_crit
|
||||||
|
// addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
// bl .unknown_exception
|
||||||
|
// b ret_from_crit_except
|
||||||
|
b .
|
||||||
|
|
||||||
|
/* System Call Interrupt */
|
||||||
|
START_EXCEPTION(system_call)
|
||||||
|
mr r9,r13 /* keep a copy of userland r13 */
|
||||||
|
mfspr r11,SPRN_SRR0 /* get return address */
|
||||||
|
mfspr r12,SPRN_SRR1 /* get previous MSR */
|
||||||
|
mfspr r13,SPRN_SPRG_PACA /* get our PACA */
|
||||||
|
b system_call_common
|
||||||
|
|
||||||
|
/* Auxillary Processor Unavailable Interrupt */
|
||||||
|
START_EXCEPTION(ap_unavailable);
|
||||||
|
NORMAL_EXCEPTION_PROLOG(0xf20, PROLOG_ADDITION_NONE)
|
||||||
|
EXCEPTION_COMMON(0xf20, PACA_EXGEN, INTS_KEEP)
|
||||||
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
bl .save_nvgprs
|
||||||
|
INTS_RESTORE_HARD
|
||||||
|
bl .unknown_exception
|
||||||
|
b .ret_from_except
|
||||||
|
|
||||||
|
/* Debug exception as a critical interrupt*/
|
||||||
|
START_EXCEPTION(debug_crit);
|
||||||
|
CRIT_EXCEPTION_PROLOG(0xd00, PROLOG_ADDITION_2REGS)
|
||||||
|
|
||||||
|
/*
|
||||||
|
* If there is a single step or branch-taken exception in an
|
||||||
|
* exception entry sequence, it was probably meant to apply to
|
||||||
|
* the code where the exception occurred (since exception entry
|
||||||
|
* doesn't turn off DE automatically). We simulate the effect
|
||||||
|
* of turning off DE on entry to an exception handler by turning
|
||||||
|
* off DE in the CSRR1 value and clearing the debug status.
|
||||||
|
*/
|
||||||
|
|
||||||
|
mfspr r14,SPRN_DBSR /* check single-step/branch taken */
|
||||||
|
andis. r15,r14,DBSR_IC@h
|
||||||
|
beq+ 1f
|
||||||
|
|
||||||
|
LOAD_REG_IMMEDIATE(r14,interrupt_base_book3e)
|
||||||
|
LOAD_REG_IMMEDIATE(r15,interrupt_end_book3e)
|
||||||
|
cmpld cr0,r10,r14
|
||||||
|
cmpld cr1,r10,r15
|
||||||
|
blt+ cr0,1f
|
||||||
|
bge+ cr1,1f
|
||||||
|
|
||||||
|
/* here it looks like we got an inappropriate debug exception. */
|
||||||
|
lis r14,DBSR_IC@h /* clear the IC event */
|
||||||
|
rlwinm r11,r11,0,~MSR_DE /* clear DE in the CSRR1 value */
|
||||||
|
mtspr SPRN_DBSR,r14
|
||||||
|
mtspr SPRN_CSRR1,r11
|
||||||
|
lwz r10,PACA_EXCRIT+EX_CR(r13) /* restore registers */
|
||||||
|
ld r1,PACA_EXCRIT+EX_R1(r13)
|
||||||
|
ld r14,PACA_EXCRIT+EX_R14(r13)
|
||||||
|
ld r15,PACA_EXCRIT+EX_R15(r13)
|
||||||
|
mtcr r10
|
||||||
|
ld r10,PACA_EXCRIT+EX_R10(r13) /* restore registers */
|
||||||
|
ld r11,PACA_EXCRIT+EX_R11(r13)
|
||||||
|
mfspr r13,SPRN_SPRG_CRIT_SCRATCH
|
||||||
|
rfci
|
||||||
|
|
||||||
|
/* Normal debug exception */
|
||||||
|
/* XXX We only handle coming from userspace for now since we can't
|
||||||
|
* quite save properly an interrupted kernel state yet
|
||||||
|
*/
|
||||||
|
1: andi. r14,r11,MSR_PR; /* check for userspace again */
|
||||||
|
beq kernel_dbg_exc; /* if from kernel mode */
|
||||||
|
|
||||||
|
/* Now we mash up things to make it look like we are coming on a
|
||||||
|
* normal exception
|
||||||
|
*/
|
||||||
|
mfspr r15,SPRN_SPRG_CRIT_SCRATCH
|
||||||
|
mtspr SPRN_SPRG_GEN_SCRATCH,r15
|
||||||
|
mfspr r14,SPRN_DBSR
|
||||||
|
EXCEPTION_COMMON(0xd00, PACA_EXCRIT, INTS_DISABLE_ALL)
|
||||||
|
std r14,_DSISR(r1)
|
||||||
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
mr r4,r14
|
||||||
|
ld r14,PACA_EXCRIT+EX_R14(r13)
|
||||||
|
ld r15,PACA_EXCRIT+EX_R15(r13)
|
||||||
|
bl .save_nvgprs
|
||||||
|
bl .DebugException
|
||||||
|
b .ret_from_except
|
||||||
|
|
||||||
|
kernel_dbg_exc:
|
||||||
|
b . /* NYI */
|
||||||
|
|
||||||
|
|
||||||
|
/*
|
||||||
|
* An interrupt came in while soft-disabled; clear EE in SRR1,
|
||||||
|
* clear paca->hard_enabled and return.
|
||||||
|
*/
|
||||||
|
masked_interrupt_book3e:
|
||||||
|
mtcr r10
|
||||||
|
stb r11,PACAHARDIRQEN(r13)
|
||||||
|
mfspr r10,SPRN_SRR1
|
||||||
|
rldicl r11,r10,48,1 /* clear MSR_EE */
|
||||||
|
rotldi r10,r11,16
|
||||||
|
mtspr SPRN_SRR1,r10
|
||||||
|
ld r10,PACA_EXGEN+EX_R10(r13); /* restore registers */
|
||||||
|
ld r11,PACA_EXGEN+EX_R11(r13);
|
||||||
|
mfspr r13,SPRN_SPRG_GEN_SCRATCH;
|
||||||
|
rfi
|
||||||
|
b .
|
||||||
|
|
||||||
|
/*
|
||||||
|
* This is called from 0x300 and 0x400 handlers after the prologs with
|
||||||
|
* r14 and r15 containing the fault address and error code, with the
|
||||||
|
* original values stashed away in the PACA
|
||||||
|
*/
|
||||||
|
storage_fault_common:
|
||||||
|
std r14,_DAR(r1)
|
||||||
|
std r15,_DSISR(r1)
|
||||||
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
mr r4,r14
|
||||||
|
mr r5,r15
|
||||||
|
ld r14,PACA_EXGEN+EX_R14(r13)
|
||||||
|
ld r15,PACA_EXGEN+EX_R15(r13)
|
||||||
|
INTS_RESTORE_HARD
|
||||||
|
bl .do_page_fault
|
||||||
|
cmpdi r3,0
|
||||||
|
bne- 1f
|
||||||
|
b .ret_from_except_lite
|
||||||
|
1: bl .save_nvgprs
|
||||||
|
mr r5,r3
|
||||||
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
ld r4,_DAR(r1)
|
||||||
|
bl .bad_page_fault
|
||||||
|
b .ret_from_except
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Alignment exception doesn't fit entirely in the 0x100 bytes so it
|
||||||
|
* continues here.
|
||||||
|
*/
|
||||||
|
alignment_more:
|
||||||
|
std r14,_DAR(r1)
|
||||||
|
std r15,_DSISR(r1)
|
||||||
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
ld r14,PACA_EXGEN+EX_R14(r13)
|
||||||
|
ld r15,PACA_EXGEN+EX_R15(r13)
|
||||||
|
bl .save_nvgprs
|
||||||
|
INTS_RESTORE_HARD
|
||||||
|
bl .alignment_exception
|
||||||
|
b .ret_from_except
|
||||||
|
|
||||||
|
/*
|
||||||
|
* We branch here from entry_64.S for the last stage of the exception
|
||||||
|
* return code path. MSR:EE is expected to be off at that point
|
||||||
|
*/
|
||||||
|
_GLOBAL(exception_return_book3e)
|
||||||
|
b 1f
|
||||||
|
|
||||||
|
/* This is the return from load_up_fpu fast path which could do with
|
||||||
|
* less GPR restores in fact, but for now we have a single return path
|
||||||
|
*/
|
||||||
|
.globl fast_exception_return
|
||||||
|
fast_exception_return:
|
||||||
|
wrteei 0
|
||||||
|
1: mr r0,r13
|
||||||
|
ld r10,_MSR(r1)
|
||||||
|
REST_4GPRS(2, r1)
|
||||||
|
andi. r6,r10,MSR_PR
|
||||||
|
REST_2GPRS(6, r1)
|
||||||
|
beq 1f
|
||||||
|
ACCOUNT_CPU_USER_EXIT(r10, r11)
|
||||||
|
ld r0,GPR13(r1)
|
||||||
|
|
||||||
|
1: stdcx. r0,0,r1 /* to clear the reservation */
|
||||||
|
|
||||||
|
ld r8,_CCR(r1)
|
||||||
|
ld r9,_LINK(r1)
|
||||||
|
ld r10,_CTR(r1)
|
||||||
|
ld r11,_XER(r1)
|
||||||
|
mtcr r8
|
||||||
|
mtlr r9
|
||||||
|
mtctr r10
|
||||||
|
mtxer r11
|
||||||
|
REST_2GPRS(8, r1)
|
||||||
|
ld r10,GPR10(r1)
|
||||||
|
ld r11,GPR11(r1)
|
||||||
|
ld r12,GPR12(r1)
|
||||||
|
mtspr SPRN_SPRG_GEN_SCRATCH,r0
|
||||||
|
|
||||||
|
std r10,PACA_EXGEN+EX_R10(r13);
|
||||||
|
std r11,PACA_EXGEN+EX_R11(r13);
|
||||||
|
ld r10,_NIP(r1)
|
||||||
|
ld r11,_MSR(r1)
|
||||||
|
ld r0,GPR0(r1)
|
||||||
|
ld r1,GPR1(r1)
|
||||||
|
mtspr SPRN_SRR0,r10
|
||||||
|
mtspr SPRN_SRR1,r11
|
||||||
|
ld r10,PACA_EXGEN+EX_R10(r13)
|
||||||
|
ld r11,PACA_EXGEN+EX_R11(r13)
|
||||||
|
mfspr r13,SPRN_SPRG_GEN_SCRATCH
|
||||||
|
rfi
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Trampolines used when spotting a bad kernel stack pointer in
|
||||||
|
* the exception entry code.
|
||||||
|
*
|
||||||
|
* TODO: move some bits like SRR0 read to trampoline, pass PACA
|
||||||
|
* index around, etc... to handle crit & mcheck
|
||||||
|
*/
|
||||||
|
BAD_STACK_TRAMPOLINE(0x000)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x100)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x200)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x300)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x400)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x500)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x600)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x700)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x800)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x900)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x980)
|
||||||
|
BAD_STACK_TRAMPOLINE(0x9f0)
|
||||||
|
BAD_STACK_TRAMPOLINE(0xa00)
|
||||||
|
BAD_STACK_TRAMPOLINE(0xb00)
|
||||||
|
BAD_STACK_TRAMPOLINE(0xc00)
|
||||||
|
BAD_STACK_TRAMPOLINE(0xd00)
|
||||||
|
BAD_STACK_TRAMPOLINE(0xe00)
|
||||||
|
BAD_STACK_TRAMPOLINE(0xf00)
|
||||||
|
BAD_STACK_TRAMPOLINE(0xf20)
|
||||||
|
|
||||||
|
.globl bad_stack_book3e
|
||||||
|
bad_stack_book3e:
|
||||||
|
/* XXX: Needs to make SPRN_SPRG_GEN depend on exception type */
|
||||||
|
mfspr r10,SPRN_SRR0; /* read SRR0 before touching stack */
|
||||||
|
ld r1,PACAEMERGSP(r13)
|
||||||
|
subi r1,r1,64+INT_FRAME_SIZE
|
||||||
|
std r10,_NIP(r1)
|
||||||
|
std r11,_MSR(r1)
|
||||||
|
ld r10,PACA_EXGEN+EX_R1(r13) /* FIXME for crit & mcheck */
|
||||||
|
lwz r11,PACA_EXGEN+EX_CR(r13) /* FIXME for crit & mcheck */
|
||||||
|
std r10,GPR1(r1)
|
||||||
|
std r11,_CCR(r1)
|
||||||
|
mfspr r10,SPRN_DEAR
|
||||||
|
mfspr r11,SPRN_ESR
|
||||||
|
std r10,_DAR(r1)
|
||||||
|
std r11,_DSISR(r1)
|
||||||
|
std r0,GPR0(r1); /* save r0 in stackframe */ \
|
||||||
|
std r2,GPR2(r1); /* save r2 in stackframe */ \
|
||||||
|
SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \
|
||||||
|
SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \
|
||||||
|
std r9,GPR9(r1); /* save r9 in stackframe */ \
|
||||||
|
ld r3,PACA_EXGEN+EX_R10(r13);/* get back r10 */ \
|
||||||
|
ld r4,PACA_EXGEN+EX_R11(r13);/* get back r11 */ \
|
||||||
|
mfspr r5,SPRN_SPRG_GEN_SCRATCH;/* get back r13 XXX can be wrong */ \
|
||||||
|
std r3,GPR10(r1); /* save r10 to stackframe */ \
|
||||||
|
std r4,GPR11(r1); /* save r11 to stackframe */ \
|
||||||
|
std r12,GPR12(r1); /* save r12 in stackframe */ \
|
||||||
|
std r5,GPR13(r1); /* save it to stackframe */ \
|
||||||
|
mflr r10
|
||||||
|
mfctr r11
|
||||||
|
mfxer r12
|
||||||
|
std r10,_LINK(r1)
|
||||||
|
std r11,_CTR(r1)
|
||||||
|
std r12,_XER(r1)
|
||||||
|
SAVE_10GPRS(14,r1)
|
||||||
|
SAVE_8GPRS(24,r1)
|
||||||
|
lhz r12,PACA_TRAP_SAVE(r13)
|
||||||
|
std r12,_TRAP(r1)
|
||||||
|
addi r11,r1,INT_FRAME_SIZE
|
||||||
|
std r11,0(r1)
|
||||||
|
li r12,0
|
||||||
|
std r12,0(r11)
|
||||||
|
ld r2,PACATOC(r13)
|
||||||
|
1: addi r3,r1,STACK_FRAME_OVERHEAD
|
||||||
|
bl .kernel_bad_stack
|
||||||
|
b 1b
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Setup the initial TLB for a core. This current implementation
|
||||||
|
* assume that whatever we are running off will not conflict with
|
||||||
|
* the new mapping at PAGE_OFFSET.
|
||||||
|
* We also make various assumptions about the processor we run on,
|
||||||
|
* this might have to be made more flexible based on the content
|
||||||
|
* of MMUCFG and friends.
|
||||||
|
*/
|
||||||
|
_GLOBAL(initial_tlb_book3e)
|
||||||
|
|
||||||
|
/* Setup MAS 0,1,2,3 and 7 for tlbwe of a 1G entry that maps the
|
||||||
|
* kernel linear mapping. We also set MAS8 once for all here though
|
||||||
|
* that will have to be made dependent on whether we are running under
|
||||||
|
* a hypervisor I suppose.
|
||||||
|
*/
|
||||||
|
li r3,MAS0_HES | MAS0_WQ_ALLWAYS
|
||||||
|
mtspr SPRN_MAS0,r3
|
||||||
|
lis r3,(MAS1_VALID | MAS1_IPROT)@h
|
||||||
|
ori r3,r3,BOOK3E_PAGESZ_1GB << MAS1_TSIZE_SHIFT
|
||||||
|
mtspr SPRN_MAS1,r3
|
||||||
|
LOAD_REG_IMMEDIATE(r3, PAGE_OFFSET | MAS2_M)
|
||||||
|
mtspr SPRN_MAS2,r3
|
||||||
|
li r3,MAS3_SR | MAS3_SW | MAS3_SX
|
||||||
|
mtspr SPRN_MAS7_MAS3,r3
|
||||||
|
li r3,0
|
||||||
|
mtspr SPRN_MAS8,r3
|
||||||
|
|
||||||
|
/* Write the TLB entry */
|
||||||
|
tlbwe
|
||||||
|
|
||||||
|
/* Now we branch the new virtual address mapped by this entry */
|
||||||
|
LOAD_REG_IMMEDIATE(r3,1f)
|
||||||
|
mtctr r3
|
||||||
|
bctr
|
||||||
|
|
||||||
|
1: /* We are now running at PAGE_OFFSET, clean the TLB of everything
|
||||||
|
* else (XXX we should scan for bolted crap from the firmware too)
|
||||||
|
*/
|
||||||
|
PPC_TLBILX(0,0,0)
|
||||||
|
sync
|
||||||
|
isync
|
||||||
|
|
||||||
|
/* We translate LR and return */
|
||||||
|
mflr r3
|
||||||
|
tovirt(r3,r3)
|
||||||
|
mtlr r3
|
||||||
|
blr
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Main entry (boot CPU, thread 0)
|
||||||
|
*
|
||||||
|
* We enter here from head_64.S, possibly after the prom_init trampoline
|
||||||
|
* with r3 and r4 already saved to r31 and 30 respectively and in 64 bits
|
||||||
|
* mode. Anything else is as it was left by the bootloader
|
||||||
|
*
|
||||||
|
* Initial requirements of this port:
|
||||||
|
*
|
||||||
|
* - Kernel loaded at 0 physical
|
||||||
|
* - A good lump of memory mapped 0:0 by UTLB entry 0
|
||||||
|
* - MSR:IS & MSR:DS set to 0
|
||||||
|
*
|
||||||
|
* Note that some of the above requirements will be relaxed in the future
|
||||||
|
* as the kernel becomes smarter at dealing with different initial conditions
|
||||||
|
* but for now you have to be careful
|
||||||
|
*/
|
||||||
|
_GLOBAL(start_initialization_book3e)
|
||||||
|
mflr r28
|
||||||
|
|
||||||
|
/* First, we need to setup some initial TLBs to map the kernel
|
||||||
|
* text, data and bss at PAGE_OFFSET. We don't have a real mode
|
||||||
|
* and always use AS 0, so we just set it up to match our link
|
||||||
|
* address and never use 0 based addresses.
|
||||||
|
*/
|
||||||
|
bl .initial_tlb_book3e
|
||||||
|
|
||||||
|
/* Init global core bits */
|
||||||
|
bl .init_core_book3e
|
||||||
|
|
||||||
|
/* Init per-thread bits */
|
||||||
|
bl .init_thread_book3e
|
||||||
|
|
||||||
|
/* Return to common init code */
|
||||||
|
tovirt(r28,r28)
|
||||||
|
mtlr r28
|
||||||
|
blr
|
||||||
|
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Secondary core/processor entry
|
||||||
|
*
|
||||||
|
* This is entered for thread 0 of a secondary core, all other threads
|
||||||
|
* are expected to be stopped. It's similar to start_initialization_book3e
|
||||||
|
* except that it's generally entered from the holding loop in head_64.S
|
||||||
|
* after CPUs have been gathered by Open Firmware.
|
||||||
|
*
|
||||||
|
* We assume we are in 32 bits mode running with whatever TLB entry was
|
||||||
|
* set for us by the firmware or POR engine.
|
||||||
|
*/
|
||||||
|
_GLOBAL(book3e_secondary_core_init_tlb_set)
|
||||||
|
li r4,1
|
||||||
|
b .generic_secondary_smp_init
|
||||||
|
|
||||||
|
_GLOBAL(book3e_secondary_core_init)
|
||||||
|
mflr r28
|
||||||
|
|
||||||
|
/* Do we need to setup initial TLB entry ? */
|
||||||
|
cmplwi r4,0
|
||||||
|
bne 2f
|
||||||
|
|
||||||
|
/* Setup TLB for this core */
|
||||||
|
bl .initial_tlb_book3e
|
||||||
|
|
||||||
|
/* We can return from the above running at a different
|
||||||
|
* address, so recalculate r2 (TOC)
|
||||||
|
*/
|
||||||
|
bl .relative_toc
|
||||||
|
|
||||||
|
/* Init global core bits */
|
||||||
|
2: bl .init_core_book3e
|
||||||
|
|
||||||
|
/* Init per-thread bits */
|
||||||
|
3: bl .init_thread_book3e
|
||||||
|
|
||||||
|
/* Return to common init code at proper virtual address.
|
||||||
|
*
|
||||||
|
* Due to various previous assumptions, we know we entered this
|
||||||
|
* function at either the final PAGE_OFFSET mapping or using a
|
||||||
|
* 1:1 mapping at 0, so we don't bother doing a complicated check
|
||||||
|
* here, we just ensure the return address has the right top bits.
|
||||||
|
*
|
||||||
|
* Note that if we ever want to be smarter about where we can be
|
||||||
|
* started from, we have to be careful that by the time we reach
|
||||||
|
* the code below we may already be running at a different location
|
||||||
|
* than the one we were called from since initial_tlb_book3e can
|
||||||
|
* have moved us already.
|
||||||
|
*/
|
||||||
|
cmpdi cr0,r28,0
|
||||||
|
blt 1f
|
||||||
|
lis r3,PAGE_OFFSET@highest
|
||||||
|
sldi r3,r3,32
|
||||||
|
or r28,r28,r3
|
||||||
|
1: mtlr r28
|
||||||
|
blr
|
||||||
|
|
||||||
|
_GLOBAL(book3e_secondary_thread_init)
|
||||||
|
mflr r28
|
||||||
|
b 3b
|
||||||
|
|
||||||
|
_STATIC(init_core_book3e)
|
||||||
|
/* Establish the interrupt vector base */
|
||||||
|
LOAD_REG_IMMEDIATE(r3, interrupt_base_book3e)
|
||||||
|
mtspr SPRN_IVPR,r3
|
||||||
|
sync
|
||||||
|
blr
|
||||||
|
|
||||||
|
_STATIC(init_thread_book3e)
|
||||||
|
lis r3,(SPRN_EPCR_ICM | SPRN_EPCR_GICM)@h
|
||||||
|
mtspr SPRN_EPCR,r3
|
||||||
|
|
||||||
|
/* Make sure interrupts are off */
|
||||||
|
wrteei 0
|
||||||
|
|
||||||
|
/* disable watchdog and FIT and enable DEC interrupts */
|
||||||
|
lis r3,TCR_DIE@h
|
||||||
|
mtspr SPRN_TCR,r3
|
||||||
|
|
||||||
|
blr
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
@ -121,10 +121,11 @@ __run_at_load:
|
||||||
*/
|
*/
|
||||||
.globl __secondary_hold
|
.globl __secondary_hold
|
||||||
__secondary_hold:
|
__secondary_hold:
|
||||||
|
#ifndef CONFIG_PPC_BOOK3E
|
||||||
mfmsr r24
|
mfmsr r24
|
||||||
ori r24,r24,MSR_RI
|
ori r24,r24,MSR_RI
|
||||||
mtmsrd r24 /* RI on */
|
mtmsrd r24 /* RI on */
|
||||||
|
#endif
|
||||||
/* Grab our physical cpu number */
|
/* Grab our physical cpu number */
|
||||||
mr r24,r3
|
mr r24,r3
|
||||||
|
|
||||||
|
|
@ -143,6 +144,7 @@ __secondary_hold:
|
||||||
ld r4,0(r4) /* deref function descriptor */
|
ld r4,0(r4) /* deref function descriptor */
|
||||||
mtctr r4
|
mtctr r4
|
||||||
mr r3,r24
|
mr r3,r24
|
||||||
|
li r4,0
|
||||||
bctr
|
bctr
|
||||||
#else
|
#else
|
||||||
BUG_OPCODE
|
BUG_OPCODE
|
||||||
|
|
@ -163,21 +165,49 @@ exception_marker:
|
||||||
#include "exceptions-64s.S"
|
#include "exceptions-64s.S"
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
_GLOBAL(generic_secondary_thread_init)
|
||||||
/*
|
|
||||||
* On pSeries and most other platforms, secondary processors spin
|
|
||||||
* in the following code.
|
|
||||||
* At entry, r3 = this processor's number (physical cpu id)
|
|
||||||
*/
|
|
||||||
_GLOBAL(generic_secondary_smp_init)
|
|
||||||
mr r24,r3
|
mr r24,r3
|
||||||
|
|
||||||
/* turn on 64-bit mode */
|
/* turn on 64-bit mode */
|
||||||
bl .enable_64b_mode
|
bl .enable_64b_mode
|
||||||
|
|
||||||
/* get the TOC pointer (real address) */
|
/* get a valid TOC pointer, wherever we're mapped at */
|
||||||
bl .relative_toc
|
bl .relative_toc
|
||||||
|
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
/* Book3E initialization */
|
||||||
|
mr r3,r24
|
||||||
|
bl .book3e_secondary_thread_init
|
||||||
|
#endif
|
||||||
|
b generic_secondary_common_init
|
||||||
|
|
||||||
|
/*
|
||||||
|
* On pSeries and most other platforms, secondary processors spin
|
||||||
|
* in the following code.
|
||||||
|
* At entry, r3 = this processor's number (physical cpu id)
|
||||||
|
*
|
||||||
|
* On Book3E, r4 = 1 to indicate that the initial TLB entry for
|
||||||
|
* this core already exists (setup via some other mechanism such
|
||||||
|
* as SCOM before entry).
|
||||||
|
*/
|
||||||
|
_GLOBAL(generic_secondary_smp_init)
|
||||||
|
mr r24,r3
|
||||||
|
mr r25,r4
|
||||||
|
|
||||||
|
/* turn on 64-bit mode */
|
||||||
|
bl .enable_64b_mode
|
||||||
|
|
||||||
|
/* get a valid TOC pointer, wherever we're mapped at */
|
||||||
|
bl .relative_toc
|
||||||
|
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
/* Book3E initialization */
|
||||||
|
mr r3,r24
|
||||||
|
mr r4,r25
|
||||||
|
bl .book3e_secondary_core_init
|
||||||
|
#endif
|
||||||
|
|
||||||
|
generic_secondary_common_init:
|
||||||
/* Set up a paca value for this processor. Since we have the
|
/* Set up a paca value for this processor. Since we have the
|
||||||
* physical cpu id in r24, we need to search the pacas to find
|
* physical cpu id in r24, we need to search the pacas to find
|
||||||
* which logical id maps to our physical one.
|
* which logical id maps to our physical one.
|
||||||
|
|
@ -196,6 +226,11 @@ _GLOBAL(generic_secondary_smp_init)
|
||||||
b .kexec_wait /* next kernel might do better */
|
b .kexec_wait /* next kernel might do better */
|
||||||
|
|
||||||
2: mtspr SPRN_SPRG_PACA,r13 /* Save vaddr of paca in an SPRG */
|
2: mtspr SPRN_SPRG_PACA,r13 /* Save vaddr of paca in an SPRG */
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
addi r12,r13,PACA_EXTLB /* and TLB exc frame in another */
|
||||||
|
mtspr SPRN_SPRG_TLB_EXFRAME,r12
|
||||||
|
#endif
|
||||||
|
|
||||||
/* From now on, r24 is expected to be logical cpuid */
|
/* From now on, r24 is expected to be logical cpuid */
|
||||||
mr r24,r5
|
mr r24,r5
|
||||||
3: HMT_LOW
|
3: HMT_LOW
|
||||||
|
|
@ -231,6 +266,7 @@ _GLOBAL(generic_secondary_smp_init)
|
||||||
* Turn the MMU off.
|
* Turn the MMU off.
|
||||||
* Assumes we're mapped EA == RA if the MMU is on.
|
* Assumes we're mapped EA == RA if the MMU is on.
|
||||||
*/
|
*/
|
||||||
|
#ifdef CONFIG_PPC_BOOK3S
|
||||||
_STATIC(__mmu_off)
|
_STATIC(__mmu_off)
|
||||||
mfmsr r3
|
mfmsr r3
|
||||||
andi. r0,r3,MSR_IR|MSR_DR
|
andi. r0,r3,MSR_IR|MSR_DR
|
||||||
|
|
@ -242,6 +278,7 @@ _STATIC(__mmu_off)
|
||||||
sync
|
sync
|
||||||
rfid
|
rfid
|
||||||
b . /* prevent speculative execution */
|
b . /* prevent speculative execution */
|
||||||
|
#endif
|
||||||
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
|
@ -279,6 +316,10 @@ _GLOBAL(__start_initialization_multiplatform)
|
||||||
mr r31,r3
|
mr r31,r3
|
||||||
mr r30,r4
|
mr r30,r4
|
||||||
|
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
bl .start_initialization_book3e
|
||||||
|
b .__after_prom_start
|
||||||
|
#else
|
||||||
/* Setup some critical 970 SPRs before switching MMU off */
|
/* Setup some critical 970 SPRs before switching MMU off */
|
||||||
mfspr r0,SPRN_PVR
|
mfspr r0,SPRN_PVR
|
||||||
srwi r0,r0,16
|
srwi r0,r0,16
|
||||||
|
|
@ -296,6 +337,7 @@ _GLOBAL(__start_initialization_multiplatform)
|
||||||
/* Switch off MMU if not already off */
|
/* Switch off MMU if not already off */
|
||||||
bl .__mmu_off
|
bl .__mmu_off
|
||||||
b .__after_prom_start
|
b .__after_prom_start
|
||||||
|
#endif /* CONFIG_PPC_BOOK3E */
|
||||||
|
|
||||||
_INIT_STATIC(__boot_from_prom)
|
_INIT_STATIC(__boot_from_prom)
|
||||||
#ifdef CONFIG_PPC_OF_BOOT_TRAMPOLINE
|
#ifdef CONFIG_PPC_OF_BOOT_TRAMPOLINE
|
||||||
|
|
@ -358,10 +400,16 @@ _STATIC(__after_prom_start)
|
||||||
* Note: This process overwrites the OF exception vectors.
|
* Note: This process overwrites the OF exception vectors.
|
||||||
*/
|
*/
|
||||||
li r3,0 /* target addr */
|
li r3,0 /* target addr */
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
tovirt(r3,r3) /* on booke, we already run at PAGE_OFFSET */
|
||||||
|
#endif
|
||||||
mr. r4,r26 /* In some cases the loader may */
|
mr. r4,r26 /* In some cases the loader may */
|
||||||
beq 9f /* have already put us at zero */
|
beq 9f /* have already put us at zero */
|
||||||
li r6,0x100 /* Start offset, the first 0x100 */
|
li r6,0x100 /* Start offset, the first 0x100 */
|
||||||
/* bytes were copied earlier. */
|
/* bytes were copied earlier. */
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
tovirt(r6,r6) /* on booke, we already run at PAGE_OFFSET */
|
||||||
|
#endif
|
||||||
|
|
||||||
#ifdef CONFIG_CRASH_DUMP
|
#ifdef CONFIG_CRASH_DUMP
|
||||||
/*
|
/*
|
||||||
|
|
@ -507,6 +555,9 @@ _GLOBAL(pmac_secondary_start)
|
||||||
* r13 = paca virtual address
|
* r13 = paca virtual address
|
||||||
* SPRG_PACA = paca virtual address
|
* SPRG_PACA = paca virtual address
|
||||||
*/
|
*/
|
||||||
|
.section ".text";
|
||||||
|
.align 2 ;
|
||||||
|
|
||||||
.globl __secondary_start
|
.globl __secondary_start
|
||||||
__secondary_start:
|
__secondary_start:
|
||||||
/* Set thread priority to MEDIUM */
|
/* Set thread priority to MEDIUM */
|
||||||
|
|
@ -543,7 +594,7 @@ END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES)
|
||||||
|
|
||||||
mtspr SPRN_SRR0,r3
|
mtspr SPRN_SRR0,r3
|
||||||
mtspr SPRN_SRR1,r4
|
mtspr SPRN_SRR1,r4
|
||||||
rfid
|
RFI
|
||||||
b . /* prevent speculative execution */
|
b . /* prevent speculative execution */
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
|
@ -564,11 +615,16 @@ _GLOBAL(start_secondary_prolog)
|
||||||
*/
|
*/
|
||||||
_GLOBAL(enable_64b_mode)
|
_GLOBAL(enable_64b_mode)
|
||||||
mfmsr r11 /* grab the current MSR */
|
mfmsr r11 /* grab the current MSR */
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
oris r11,r11,0x8000 /* CM bit set, we'll set ICM later */
|
||||||
|
mtmsr r11
|
||||||
|
#else /* CONFIG_PPC_BOOK3E */
|
||||||
li r12,(MSR_SF | MSR_ISF)@highest
|
li r12,(MSR_SF | MSR_ISF)@highest
|
||||||
sldi r12,r12,48
|
sldi r12,r12,48
|
||||||
or r11,r11,r12
|
or r11,r11,r12
|
||||||
mtmsrd r11
|
mtmsrd r11
|
||||||
isync
|
isync
|
||||||
|
#endif
|
||||||
blr
|
blr
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
|
@ -612,9 +668,11 @@ _INIT_STATIC(start_here_multiplatform)
|
||||||
bdnz 3b
|
bdnz 3b
|
||||||
4:
|
4:
|
||||||
|
|
||||||
|
#ifndef CONFIG_PPC_BOOK3E
|
||||||
mfmsr r6
|
mfmsr r6
|
||||||
ori r6,r6,MSR_RI
|
ori r6,r6,MSR_RI
|
||||||
mtmsrd r6 /* RI on */
|
mtmsrd r6 /* RI on */
|
||||||
|
#endif
|
||||||
|
|
||||||
#ifdef CONFIG_RELOCATABLE
|
#ifdef CONFIG_RELOCATABLE
|
||||||
/* Save the physical address we're running at in kernstart_addr */
|
/* Save the physical address we're running at in kernstart_addr */
|
||||||
|
|
@ -647,7 +705,7 @@ _INIT_STATIC(start_here_multiplatform)
|
||||||
ld r4,PACAKMSR(r13)
|
ld r4,PACAKMSR(r13)
|
||||||
mtspr SPRN_SRR0,r3
|
mtspr SPRN_SRR0,r3
|
||||||
mtspr SPRN_SRR1,r4
|
mtspr SPRN_SRR1,r4
|
||||||
rfid
|
RFI
|
||||||
b . /* prevent speculative execution */
|
b . /* prevent speculative execution */
|
||||||
|
|
||||||
/* This is where all platforms converge execution */
|
/* This is where all platforms converge execution */
|
||||||
|
|
|
||||||
|
|
@ -454,6 +454,24 @@ static void __init irqstack_early_init(void)
|
||||||
#define irqstack_early_init()
|
#define irqstack_early_init()
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
#ifdef CONFIG_PPC_BOOK3E
|
||||||
|
static void __init exc_lvl_early_init(void)
|
||||||
|
{
|
||||||
|
unsigned int i;
|
||||||
|
|
||||||
|
for_each_possible_cpu(i) {
|
||||||
|
critirq_ctx[i] = (struct thread_info *)
|
||||||
|
__va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
|
||||||
|
dbgirq_ctx[i] = (struct thread_info *)
|
||||||
|
__va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
|
||||||
|
mcheckirq_ctx[i] = (struct thread_info *)
|
||||||
|
__va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
#else
|
||||||
|
#define exc_lvl_early_init()
|
||||||
|
#endif
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Stack space used when we detect a bad kernel stack pointer, and
|
* Stack space used when we detect a bad kernel stack pointer, and
|
||||||
* early in SMP boots before relocation is enabled.
|
* early in SMP boots before relocation is enabled.
|
||||||
|
|
@ -513,6 +531,7 @@ void __init setup_arch(char **cmdline_p)
|
||||||
init_mm.brk = klimit;
|
init_mm.brk = klimit;
|
||||||
|
|
||||||
irqstack_early_init();
|
irqstack_early_init();
|
||||||
|
exc_lvl_early_init();
|
||||||
emergency_stack_init();
|
emergency_stack_init();
|
||||||
|
|
||||||
#ifdef CONFIG_PPC_STD_MMU_64
|
#ifdef CONFIG_PPC_STD_MMU_64
|
||||||
|
|
|
||||||
|
|
@ -13,6 +13,7 @@ obj-y := fault.o mem.o pgtable.o gup.o \
|
||||||
pgtable_$(CONFIG_WORD_SIZE).o
|
pgtable_$(CONFIG_WORD_SIZE).o
|
||||||
obj-$(CONFIG_PPC_MMU_NOHASH) += mmu_context_nohash.o tlb_nohash.o \
|
obj-$(CONFIG_PPC_MMU_NOHASH) += mmu_context_nohash.o tlb_nohash.o \
|
||||||
tlb_nohash_low.o
|
tlb_nohash_low.o
|
||||||
|
obj-$(CONFIG_PPC_BOOK3E) += tlb_low_$(CONFIG_WORD_SIZE)e.o
|
||||||
obj-$(CONFIG_PPC64) += mmap_64.o
|
obj-$(CONFIG_PPC64) += mmap_64.o
|
||||||
hash64-$(CONFIG_PPC_NATIVE) := hash_native_64.o
|
hash64-$(CONFIG_PPC_NATIVE) := hash_native_64.o
|
||||||
obj-$(CONFIG_PPC_STD_MMU_64) += hash_utils_64.o \
|
obj-$(CONFIG_PPC_STD_MMU_64) += hash_utils_64.o \
|
||||||
|
|
|
||||||
|
|
@ -57,15 +57,35 @@ config E200
|
||||||
|
|
||||||
endchoice
|
endchoice
|
||||||
|
|
||||||
config PPC_BOOK3S_64
|
choice
|
||||||
def_bool y
|
prompt "Processor Type"
|
||||||
depends on PPC64
|
depends on PPC64
|
||||||
|
help
|
||||||
|
There are two families of 64 bit PowerPC chips supported.
|
||||||
|
The most common ones are the desktop and server CPUs
|
||||||
|
(POWER3, RS64, POWER4, POWER5, POWER5+, POWER6, ...)
|
||||||
|
|
||||||
|
The other are the "embedded" processors compliant with the
|
||||||
|
"Book 3E" variant of the architecture
|
||||||
|
|
||||||
|
config PPC_BOOK3S_64
|
||||||
|
bool "Server processors"
|
||||||
select PPC_FPU
|
select PPC_FPU
|
||||||
|
|
||||||
|
config PPC_BOOK3E_64
|
||||||
|
bool "Embedded processors"
|
||||||
|
select PPC_FPU # Make it a choice ?
|
||||||
|
|
||||||
|
endchoice
|
||||||
|
|
||||||
config PPC_BOOK3S
|
config PPC_BOOK3S
|
||||||
def_bool y
|
def_bool y
|
||||||
depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
|
depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
|
||||||
|
|
||||||
|
config PPC_BOOK3E
|
||||||
|
def_bool y
|
||||||
|
depends on PPC_BOOK3E_64
|
||||||
|
|
||||||
config POWER4_ONLY
|
config POWER4_ONLY
|
||||||
bool "Optimize for POWER4"
|
bool "Optimize for POWER4"
|
||||||
depends on PPC64 && PPC_BOOK3S
|
depends on PPC64 && PPC_BOOK3S
|
||||||
|
|
@ -125,7 +145,7 @@ config 4xx
|
||||||
|
|
||||||
config BOOKE
|
config BOOKE
|
||||||
bool
|
bool
|
||||||
depends on E200 || E500 || 44x
|
depends on E200 || E500 || 44x || PPC_BOOK3E
|
||||||
default y
|
default y
|
||||||
|
|
||||||
config FSL_BOOKE
|
config FSL_BOOKE
|
||||||
|
|
@ -223,9 +243,17 @@ config PPC_MMU_NOHASH
|
||||||
def_bool y
|
def_bool y
|
||||||
depends on !PPC_STD_MMU
|
depends on !PPC_STD_MMU
|
||||||
|
|
||||||
|
config PPC_MMU_NOHASH_32
|
||||||
|
def_bool y
|
||||||
|
depends on PPC_MMU_NOHASH && PPC32
|
||||||
|
|
||||||
|
config PPC_MMU_NOHASH_64
|
||||||
|
def_bool y
|
||||||
|
depends on PPC_MMU_NOHASH && PPC64
|
||||||
|
|
||||||
config PPC_BOOK3E_MMU
|
config PPC_BOOK3E_MMU
|
||||||
def_bool y
|
def_bool y
|
||||||
depends on FSL_BOOKE
|
depends on FSL_BOOKE || PPC_BOOK3E
|
||||||
|
|
||||||
config PPC_MM_SLICES
|
config PPC_MM_SLICES
|
||||||
bool
|
bool
|
||||||
|
|
@ -257,7 +285,7 @@ config PPC_PERF_CTRS
|
||||||
This enables the powerpc-specific perf_counter back-end.
|
This enables the powerpc-specific perf_counter back-end.
|
||||||
|
|
||||||
config SMP
|
config SMP
|
||||||
depends on PPC_STD_MMU || FSL_BOOKE
|
depends on PPC_BOOK3S || PPC_BOOK3E || FSL_BOOKE
|
||||||
bool "Symmetric multi-processing support"
|
bool "Symmetric multi-processing support"
|
||||||
---help---
|
---help---
|
||||||
This enables support for systems with more than one CPU. If you have
|
This enables support for systems with more than one CPU. If you have
|
||||||
|
|
|
||||||
|
|
@ -2570,7 +2570,7 @@ static void xmon_print_symbol(unsigned long address, const char *mid,
|
||||||
printf("%s", after);
|
printf("%s", after);
|
||||||
}
|
}
|
||||||
|
|
||||||
#ifdef CONFIG_PPC64
|
#ifdef CONFIG_PPC_BOOK3S_64
|
||||||
static void dump_slb(void)
|
static void dump_slb(void)
|
||||||
{
|
{
|
||||||
int i;
|
int i;
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue