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lib: sbi_trap: Simplify sbi_trap_handler() API

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This patch simplify sbi_trap_handler() API as follows:
1. Remove current hartid local variable because sbi_trap_handler()
   itself does not need it.
2. Remove scratch parameter because none of the functions directly
   called by sbi_trap_handler() require it.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel 2020-03-20 08:53:35 +05:30 • committed by Anup Patel
parent 7487116b41
commit 40b221baff
3 changed files with 10 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

1
firmware/fw_base.S
View file

@ -556,7 +556,6 @@ _skip_mstatush_save:
/* Call C routine */ /* Call C routine */
add a0, sp, zero add a0, sp, zero
csrr a1, CSR_MSCRATCH
call sbi_trap_handler call sbi_trap_handler
/* Restore all general regisers except SP and T0 */ /* Restore all general regisers except SP and T0 */

5
include/sbi/sbi_trap.h
View file

@ -202,13 +202,10 @@ struct sbi_trap_info {
unsigned long tinst; unsigned long tinst;
}; };
struct sbi_scratch;
int sbi_trap_redirect(struct sbi_trap_regs *regs, int sbi_trap_redirect(struct sbi_trap_regs *regs,
struct sbi_trap_info *trap); struct sbi_trap_info *trap);
void sbi_trap_handler(struct sbi_trap_regs *regs, void sbi_trap_handler(struct sbi_trap_regs *regs);
struct sbi_scratch *scratch);
#endif #endif

20
lib/sbi/sbi_trap.c
View file

@ -16,13 +16,16 @@
#include <sbi/sbi_illegal_insn.h> #include <sbi/sbi_illegal_insn.h>
#include <sbi/sbi_ipi.h> #include <sbi/sbi_ipi.h>
#include <sbi/sbi_misaligned_ldst.h> #include <sbi/sbi_misaligned_ldst.h>
#include <sbi/sbi_scratch.h>
#include <sbi/sbi_timer.h> #include <sbi/sbi_timer.h>
#include <sbi/sbi_trap.h> #include <sbi/sbi_trap.h>
static void __noreturn sbi_trap_error(const char *msg, int rc, u32 hartid, static void __noreturn sbi_trap_error(const char *msg, int rc,
ulong mcause, ulong mtval, ulong mtval2, ulong mcause, ulong mtval, ulong mtval2,
ulong mtinst, struct sbi_trap_regs *regs) ulong mtinst, struct sbi_trap_regs *regs)
{ {
u32 hartid = current_hartid();
sbi_printf("%s: hart%d: %s (error %d)\n", __func__, hartid, msg, rc); sbi_printf("%s: hart%d: %s (error %d)\n", __func__, hartid, msg, rc);
sbi_printf("%s: hart%d: mcause=0x%" PRILX " mtval=0x%" PRILX "\n", sbi_printf("%s: hart%d: mcause=0x%" PRILX " mtval=0x%" PRILX "\n",
__func__, hartid, mcause, mtval); __func__, hartid, mcause, mtval);
@ -208,14 +211,11 @@ int sbi_trap_redirect(struct sbi_trap_regs *regs,
* 7. Interrupts are disabled in MSTATUS CSR * 7. Interrupts are disabled in MSTATUS CSR
* *
* @param regs pointer to register state * @param regs pointer to register state
* @param scratch pointer to sbi_scratch of current HART
*/ */
void sbi_trap_handler(struct sbi_trap_regs *regs, void sbi_trap_handler(struct sbi_trap_regs *regs)
struct sbi_scratch *scratch)
{ {
int rc = SBI_ENOTSUPP; int rc = SBI_ENOTSUPP;
const char *msg = "trap handler failed"; const char *msg = "trap handler failed";
u32 hartid = current_hartid();
ulong mcause = csr_read(CSR_MCAUSE); ulong mcause = csr_read(CSR_MCAUSE);
ulong mtval = csr_read(CSR_MTVAL), mtval2 = 0, mtinst = 0; ulong mtval = csr_read(CSR_MTVAL), mtval2 = 0, mtinst = 0;
struct sbi_trap_info trap; struct sbi_trap_info trap;
@ -229,10 +229,10 @@ void sbi_trap_handler(struct sbi_trap_regs *regs,
mcause &= ~(1UL << (__riscv_xlen - 1)); mcause &= ~(1UL << (__riscv_xlen - 1));
switch (mcause) { switch (mcause) {
case IRQ_M_TIMER: case IRQ_M_TIMER:
sbi_timer_process(scratch); sbi_timer_process(sbi_scratch_thishart_ptr());
break; break;
case IRQ_M_SOFT: case IRQ_M_SOFT:
sbi_ipi_process(scratch); sbi_ipi_process(sbi_scratch_thishart_ptr());
break; break;
default: default:
msg = "unhandled external interrupt"; msg = "unhandled external interrupt";
@ -271,8 +271,6 @@ void sbi_trap_handler(struct sbi_trap_regs *regs,
}; };
trap_error: trap_error:
if (rc) { if (rc)
sbi_trap_error(msg, rc, hartid, mcause, mtval, sbi_trap_error(msg, rc, mcause, mtval, mtval2, mtinst, regs);
mtval2, mtinst, regs);
}
} }