11ecbcf5cb
Use pm_acpi_smi_cmd_port() to get the APMC trigger IO port instead of using the hard-coded APM_CNT define. This makes sure that the correct APMC IO port will be used even when a system doesn't use the default APM IO port. TEST=SMMSTORE V2 still works with the EDK2 payload on Careena Signed-off-by: Felix Held <felix-coreboot@felixheld.de> Change-Id: Icb79c91cfcd75db760bd80cff7f3d0400d1f16cd Reviewed-on: https://review.coreboot.org/c/coreboot/+/79568 Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
25 lines
568 B
C
25 lines
568 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <stdint.h>
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#include <cpu/x86/smm.h>
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/*
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* calls into SMM with the given cmd and subcmd in eax, and arg in ebx
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*
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* static inline because the resulting assembly is often smaller than
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* the call sequence due to constant folding.
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*/
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static inline u32 call_smm(u8 cmd, u8 subcmd, void *arg)
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{
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const uint16_t apmc_port = pm_acpi_smi_cmd_port();
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u32 res = 0;
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__asm__ __volatile__ (
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"outb %%al, %%dx"
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: "=a" (res)
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: "a" ((subcmd << 8) | cmd),
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"b" (arg),
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"d" (apmc_port)
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: "memory");
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return res;
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}
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