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include: sbi: Add trap_context pointer in struct sbi_scratch

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To track nested traps, the struct sbi_scratch needs a pointer the
current trap context so add trap_context pointer in struct sbi_context.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
Tested-by: Samuel Holland <samuel.holland@sifive.com>
This commit is contained in:
Anup Patel
2024-03-11 12:39:00 +05:30
committed by Anup Patel
parent ebb697ad8c
commit 60ffc154c8
2 changed files with 14 additions and 4 deletions
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3
firmware/fw_base.S
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@@ -298,7 +298,8 @@ _scratch_init:
/* Store hartid-to-scratch function address in scratch space */
lla a4, _hartid_to_scratch
REG_S a4, SBI_SCRATCH_HARTID_TO_SCRATCH_OFFSET(tp)
/* Clear tmp0 in scratch space */
/* Clear trap_context and tmp0 in scratch space */
REG_S zero, SBI_SCRATCH_TRAP_CONTEXT_OFFSET(tp)
REG_S zero, SBI_SCRATCH_TMP0_OFFSET(tp)
/* Store firmware options in scratch space */
MOV_3R s0, a0, s1, a1, s2, a2

15
include/sbi/sbi_scratch.h
View File

@@ -36,12 +36,14 @@
#define SBI_SCRATCH_PLATFORM_ADDR_OFFSET (9 * __SIZEOF_POINTER__)
/** Offset of hartid_to_scratch member in sbi_scratch */
#define SBI_SCRATCH_HARTID_TO_SCRATCH_OFFSET (10 * __SIZEOF_POINTER__)
/** Offset of trap_context member in sbi_scratch */
#define SBI_SCRATCH_TRAP_CONTEXT_OFFSET (11 * __SIZEOF_POINTER__)
/** Offset of tmp0 member in sbi_scratch */
#define SBI_SCRATCH_TMP0_OFFSET (11 * __SIZEOF_POINTER__)
#define SBI_SCRATCH_TMP0_OFFSET (12 * __SIZEOF_POINTER__)
/** Offset of options member in sbi_scratch */
#define SBI_SCRATCH_OPTIONS_OFFSET (12 * __SIZEOF_POINTER__)
#define SBI_SCRATCH_OPTIONS_OFFSET (13 * __SIZEOF_POINTER__)
/** Offset of extra space in sbi_scratch */
#define SBI_SCRATCH_EXTRA_SPACE_OFFSET (13 * __SIZEOF_POINTER__)
#define SBI_SCRATCH_EXTRA_SPACE_OFFSET (14 * __SIZEOF_POINTER__)
/** Maximum size of sbi_scratch (4KB) */
#define SBI_SCRATCH_SIZE (0x1000)
@@ -75,6 +77,8 @@ struct sbi_scratch {
unsigned long platform_addr;
/** Address of HART ID to sbi_scratch conversion function */
unsigned long hartid_to_scratch;
/** Address of current trap context */
unsigned long trap_context;
/** Temporary storage */
unsigned long tmp0;
/** Options for OpenSBI library */
@@ -125,6 +129,11 @@ _Static_assert(
== SBI_SCRATCH_HARTID_TO_SCRATCH_OFFSET,
"struct sbi_scratch definition has changed, please redefine "
"SBI_SCRATCH_HARTID_TO_SCRATCH_OFFSET");
_Static_assert(
offsetof(struct sbi_scratch, trap_context)
== SBI_SCRATCH_TRAP_CONTEXT_OFFSET,
"struct sbi_scratch definition has changed, please redefine "
"SBI_SCRATCH_TRAP_CONTEXT_OFFSET");
_Static_assert(
offsetof(struct sbi_scratch, tmp0)
== SBI_SCRATCH_TMP0_OFFSET,