4db2e8e88a
Tested with SMI_DEBUG: SMM prints things on the console. Change-Id: I7db55aaabd16a6ef585c4802218790bf04650b13 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/61494 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <console/console.h>
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#include <cpu/x86/mp.h>
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#include <stdint.h>
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#include <cpu/intel/smm_reloc.h>
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#include <cpu/amd/amd64_save_state.h>
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#include <mainboard/emulation/qemu-i440fx/fw_cfg.h>
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static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize,
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size_t *smm_save_state_size)
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{
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printk(BIOS_DEBUG, "Setting up SMI for CPU\n");
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if (CONFIG(SMM_TSEG))
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smm_subregion(SMM_SUBREGION_HANDLER, perm_smbase, perm_smsize);
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if (CONFIG(SMM_ASEG)) {
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smm_open_aseg();
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*perm_smbase = 0xa0000;
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*perm_smsize = 0x10000;
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}
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/* FIXME: on X86_64 the save state size is smaller than the size of the SMM stub */
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*smm_save_state_size = sizeof(amd64_smm_state_save_area_t);
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printk(BIOS_DEBUG, "Save state size: 0x%zx bytes\n", *smm_save_state_size);
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}
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/*
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* The relocation work is actually performed in SMM context, but the code
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* resides in the ramstage module. This occurs by trampolining from the default
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* SMRAM entry point to here.
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*/
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static void relocation_handler(int cpu, uintptr_t curr_smbase,
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uintptr_t staggered_smbase)
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{
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/* The em64t101 save state is sufficiently compatible with older
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save states with regards of smbase, smm_revision. */
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amd64_smm_state_save_area_t *save_state;
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u32 smbase = staggered_smbase;
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save_state = (void *)(curr_smbase + SMM_DEFAULT_SIZE - sizeof(*save_state));
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save_state->smbase = smbase;
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printk(BIOS_DEBUG, "In relocation handler: cpu %d\n", cpu);
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printk(BIOS_DEBUG, "SMM revision: 0x%08x\n", save_state->smm_revision);
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printk(BIOS_DEBUG, "New SMBASE=0x%08x\n", smbase);
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}
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static void post_mp_init(void)
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{
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/* Now that all APs have been relocated as well as the BSP let SMIs start flowing. */
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global_smi_enable();
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/* Lock down the SMRAM space. */
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smm_lock();
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}
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const struct mp_ops mp_ops_with_smm = {
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.get_cpu_count = fw_cfg_max_cpus,
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.get_smm_info = get_smm_info,
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.pre_mp_smm_init = smm_southbridge_clear_state,
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.relocation_handler = relocation_handler,
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.post_mp_init = post_mp_init,
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};
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