diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2020-08-09 15:09:51 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-09-29 05:59:37 +0000 |
| commit | ac0d2ee2de005968b20f421a0ea97edcbea3ea19 (patch) | |
| tree | c0587bedfcc6f8813443dc8ce95d5f509d8c5d95 /src/cpu | |
| parent | 258ceb75074ed47d221bad0a4ebae805deb185ed (diff) | |
cpu/x86/smm/smmhandler.c: Get revision using C code
This allows to remove some assembly code.
Tested with QEMU Q35 to still print the revision correctly.
Change-Id: I36fb0e8bb1f46806b11ef8102ce74c0d10fd3927
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44319
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/x86/smm/smihandler.c | 7 | ||||
| -rw-r--r-- | src/cpu/x86/smm/smmhandler.S | 10 |
2 files changed, 4 insertions, 13 deletions
diff --git a/src/cpu/x86/smm/smihandler.c b/src/cpu/x86/smm/smihandler.c index 8f7ebfbf66..99594beae7 100644 --- a/src/cpu/x86/smm/smihandler.c +++ b/src/cpu/x86/smm/smihandler.c @@ -141,9 +141,10 @@ bool smm_region_overlaps_handler(const struct region *r) * @param smm_revision revision of the smm state save map */ -void smi_handler(u32 smm_revision) +void smi_handler(void) { unsigned int node; + const uint32_t smm_rev = smm_revision(); smm_state_save_area_t state_save; u32 smm_base = SMM_BASE; /* ASEG */ @@ -171,7 +172,7 @@ void smi_handler(u32 smm_revision) printk(BIOS_SPEW, "\nSMI# #%d\n", node); - switch (smm_revision) { + switch (smm_rev) { case 0x00030002: case 0x00030007: state_save.type = LEGACY; @@ -199,7 +200,7 @@ void smi_handler(u32 smm_revision) SMM_AMD64_ARCH_OFFSET, node); break; default: - printk(BIOS_DEBUG, "smm_revision: 0x%08x\n", smm_revision); + printk(BIOS_DEBUG, "smm_revision: 0x%08x\n", smm_rev); printk(BIOS_DEBUG, "SMI# not supported on your CPU\n"); /* Don't release lock, so no further SMI will happen, * if we don't handle it anyways. diff --git a/src/cpu/x86/smm/smmhandler.S b/src/cpu/x86/smm/smmhandler.S index 1cff23afe6..4cbfbfdfb1 100644 --- a/src/cpu/x86/smm/smmhandler.S +++ b/src/cpu/x86/smm/smmhandler.S @@ -165,10 +165,6 @@ untampered_lapic: addl $SMM_STACK_SIZE, %ebx movl %ebx, %esp - /* Get SMM revision */ - movl $0xa8000 + 0x7efc, %ebx /* core 0 address */ - subl %ebp, %ebx /* subtract core X offset */ - #if defined(__x86_64__) /* Backup IA32_EFER. Preserves ebx. */ movl $(IA32_EFER), %ecx @@ -179,13 +175,7 @@ untampered_lapic: /* Enable long mode. Preserves ebx. */ #include <cpu/x86/64bit/entry64.inc> - mov (%ebx), %rdi - -#else - movl (%ebx), %eax - pushl %eax #endif - /* Call C handler */ call smi_handler |