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efi: Use the installed ACPI tables

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U-Boot sets up the ACPI tables during startup. Rather than creating a
new set, install the existing ones. Create a memory-map record to cover
the tables.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2023-07-15 21:39:17 -06:00 • committed by Bin Meng
parent 92ccaf7d97
commit 085f8db6b9
1 changed files with 19 additions and 14 deletions
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33
lib/efi_loader/efi_acpi.c
View file

@ -10,6 +10,9 @@
#include <log.h>
#include <mapmem.h>
#include <acpi/acpi_table.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
static const efi_guid_t acpi_guid = EFI_ACPI_TABLE_GUID;
@ -20,26 +23,28 @@ static const efi_guid_t acpi_guid = EFI_ACPI_TABLE_GUID;
*/
efi_status_t efi_acpi_register(void)
{
/* Map within the low 32 bits, to allow for 32bit ACPI tables */
u64 acpi = U32_MAX;
ulong addr, start, end;
efi_status_t ret;
ulong addr;
/* Reserve 64kiB page for ACPI */
ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
EFI_ACPI_RECLAIM_MEMORY, 16, &acpi);
/* Mark space used for tables */
start = ALIGN_DOWN(gd->arch.table_start, EFI_PAGE_MASK);
end = ALIGN(gd->arch.table_end, EFI_PAGE_MASK);
ret = efi_add_memory_map(start, end - start, EFI_ACPI_RECLAIM_MEMORY);
if (ret != EFI_SUCCESS)
return ret;
if (gd->arch.table_start_high) {
start = ALIGN_DOWN(gd->arch.table_start_high, EFI_PAGE_MASK);
end = ALIGN(gd->arch.table_end_high, EFI_PAGE_MASK);
ret = efi_add_memory_map(start, end - start,
EFI_ACPI_RECLAIM_MEMORY);
if (ret != EFI_SUCCESS)
return ret;
}
/*
* Generate ACPI tables - we know that efi_allocate_pages() returns
* a 4k-aligned address, so it is safe to assume that
* write_acpi_tables() will write the table at that address.
*/
addr = map_to_sysmem((void *)(ulong)acpi);
write_acpi_tables(addr);
addr = gd_acpi_start();
printf("EFI using ACPI tables at %lx\n", addr);
/* And expose them to our EFI payload */
return efi_install_configuration_table(&acpi_guid,
(void *)(uintptr_t)acpi);
(void *)(ulong)addr);
}