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firmware: Use CSR_<FOO> instead of <foo> for csr*

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Some older toolchains may not have all the csr's defined. Update all
the csr functions to use the CSR_ #define values instead of the
toolchain defined values.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Atish Patra 2019-02-13 11:03:53 -08:00 • committed by Anup Patel
parent 28d1dd2430
commit 35e617385f
2 changed files with 20 additions and 19 deletions
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32
firmware/fw_base.S
View file

@ -22,7 +22,7 @@ _start:
* Jump to warm-boot if this is not the first core booting,
* that is, for mhartid != 0
*/
csrr a6, mhartid
csrr a6, CSR_MHARTID
blt zero, a6, _wait_for_boot_hart
/* Zero-out BSS */
@ -126,15 +126,15 @@ _wait_for_boot_hart:
_start_warm:
/* Disable and clear all interrupts */
csrw mie, zero
csrw mip, zero
csrw CSR_MIE, zero
csrw CSR_MIP, zero
/* Preload per-HART details
* s6 -> HART ID
* s7 -> HART Count
* s8 -> HART Stack Size
*/
csrr s6, mhartid
csrr s6, CSR_MHARTID
la a4, platform
#if __riscv_xlen == 64
lwu s7, SBI_PLATFORM_HART_COUNT_OFFSET(a4)
@ -145,7 +145,7 @@ _start_warm:
#endif
/* HART ID should be within expected limit */
csrr s6, mhartid
csrr s6, CSR_MHARTID
bge s6, s7, _start_hang
/* Setup scratch space */
@ -156,7 +156,7 @@ _start_warm:
sub tp, tp, a5
li a5, SBI_SCRATCH_SIZE
sub tp, tp, a5
csrw mscratch, tp
csrw CSR_MSCRATCH, tp
/* Initialize scratch space */
la a4, _fw_start
@ -187,11 +187,11 @@ _start_warm:
/* Setup trap handler */
la a4, _trap_handler
csrw mtvec, a4
csrw CSR_MTVEC, a4
/* Initialize SBI runtime */
csrr a0, mscratch
call sbi_init
csrr a0, CSR_MSCRATCH
Call sbi_init
/* We don't expect to reach here hence just hang */
j _start_hang
@ -243,7 +243,7 @@ _start_hang:
.globl _trap_handler
_trap_handler:
/* Swap SP and MSCRATCH */
csrrw sp, mscratch, sp
csrrw sp, CSR_MSCRATCH, sp
/* Setup exception stack */
add sp, sp, -(SBI_TRAP_REGS_SIZE)
@ -256,12 +256,12 @@ _trap_handler:
/* Save original SP and restore MSCRATCH */
add t0, sp, SBI_TRAP_REGS_SIZE
csrrw t0, mscratch, t0
csrrw t0, CSR_MSCRATCH, t0
REG_S t0, SBI_TRAP_REGS_OFFSET(sp)(sp)
/* Save MEPC and MSTATUS CSRs */
csrr t0, mepc
csrr t1, mstatus
csrr t0, CSR_MEPC
csrr t1, CSR_MSTATUS
/*
* Note: Fast path trap handling can be done here
@ -305,7 +305,7 @@ _trap_handler:
/* Call C routine */
add a0, sp, zero
csrr a1, mscratch
csrr a1, CSR_MSCRATCH
call sbi_trap_handler
/* Restore all general regisers except SP, RA, T0, T1, T2, and T3 */
@ -348,8 +348,8 @@ _trap_handler:
*/
/* Restore MEPC and MSTATUS CSRs */
csrw mepc, t0
csrw mstatus, t1
csrw CSR_MEPC, t0
csrw CSR_MSTATUS, t1
/* Restore RA, T0, T1, and T2 */
REG_L ra, SBI_TRAP_REGS_OFFSET(ra)(sp)

7
firmware/payloads/test_head.S
View file

@ -7,6 +7,7 @@
* Anup Patel <anup.patel@wdc.com>
*/
#include <sbi/riscv_encoding.h>
#define __ASM_STR(x) x
#if __riscv_xlen == 64
@ -48,12 +49,12 @@ _bss_zero:
_start_warm:
/* Disable and clear all interrupts */
csrw sie, zero
csrw sip, zero
csrw CSR_SIE, zero
csrw CSR_SIP, zero
/* Setup exception vectors */
la a3, _start_hang
csrw stvec, a3
csrw CSR_STVEC, a3
/* Setup stack */
la a3, _payload_end