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lib: Print interrupt and exception delegation in boot prints

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We print MIDELEG and MEDELEG CSRs as part of boot prints so that
boot log shows the interrupts and exceptions delegated to S-mode.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-02-18 11:53:52 +05:30
committed by Anup Patel
parent bc874e34ce
commit 24c3082ea4
3 changed files with 15 additions and 2 deletions
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1
include/sbi/sbi_hart.h
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@@ -20,6 +20,7 @@ void *sbi_hart_get_trap_info(struct sbi_scratch *scratch);
void sbi_hart_set_trap_info(struct sbi_scratch *scratch, void *data); void sbi_hart_set_trap_info(struct sbi_scratch *scratch, void *data);
void sbi_hart_delegation_dump(struct sbi_scratch *scratch);
void sbi_hart_pmp_dump(struct sbi_scratch *scratch); void sbi_hart_pmp_dump(struct sbi_scratch *scratch);
void __attribute__((noreturn)) sbi_hart_hang(void); void __attribute__((noreturn)) sbi_hart_hang(void);

11
lib/sbi/sbi_hart.c
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@@ -107,6 +107,17 @@ static int delegate_traps(struct sbi_scratch *scratch, u32 hartid)
return 0; return 0;
} }
void sbi_hart_delegation_dump(struct sbi_scratch *scratch)
{
#if __riscv_xlen == 32
sbi_printf("MIDELEG : 0x%08lx\n", csr_read(CSR_MIDELEG));
sbi_printf("MEDELEG : 0x%08lx\n", csr_read(CSR_MEDELEG));
#else
sbi_printf("MIDELEG : 0x%016lx\n", csr_read(CSR_MIDELEG));
sbi_printf("MEDELEG : 0x%016lx\n", csr_read(CSR_MEDELEG));
#endif
}
unsigned long log2roundup(unsigned long x) unsigned long log2roundup(unsigned long x)
{ {
unsigned long ret = 0; unsigned long ret = 0;

1
lib/sbi/sbi_init.c
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@@ -68,6 +68,7 @@ static void sbi_boot_prints(struct sbi_scratch *scratch, u32 hartid)
sbi_ecall_version_major(), sbi_ecall_version_minor()); sbi_ecall_version_major(), sbi_ecall_version_minor());
sbi_printf("\n"); sbi_printf("\n");
sbi_hart_delegation_dump(scratch);
sbi_hart_pmp_dump(scratch); sbi_hart_pmp_dump(scratch);
} }