70 lines
1.1 KiB
C
70 lines
1.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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#include <acpi/acpi_gnvs.h>
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#include <acpi/acpigen.h>
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#include <cbmem.h>
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#include <console/console.h>
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#include <string.h>
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#include <types.h>
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static void *gnvs;
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void *acpi_get_gnvs(void)
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{
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if (gnvs)
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return gnvs;
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gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
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if (gnvs)
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return gnvs;
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printk(BIOS_ERR, "Unable to locate Global NVS\n");
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return NULL;
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}
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static void gnvs_assign_cbmc(void)
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{
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uint32_t *gnvs_cbmc = gnvs_cbmc_ptr();
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if (gnvs_cbmc)
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*gnvs_cbmc = (uintptr_t)cbmem_find(CBMEM_ID_CONSOLE);
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}
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void *gnvs_get_or_create(void)
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{
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size_t gnvs_size;
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if (gnvs)
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return gnvs;
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gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
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if (gnvs)
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return gnvs;
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gnvs_size = gnvs_size_of_array();
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gnvs = cbmem_add(CBMEM_ID_ACPI_GNVS, gnvs_size);
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if (!gnvs)
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return gnvs;
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memset(gnvs, 0, gnvs_size);
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if (CONFIG(CONSOLE_CBMEM))
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gnvs_assign_cbmc();
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if (CONFIG(CHROMEOS))
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gnvs_assign_chromeos();
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return gnvs;
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}
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void acpi_inject_nvsa(void)
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{
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uintptr_t gnvs_address = (uintptr_t)acpi_get_gnvs();
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if (!gnvs_address)
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return;
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acpigen_write_scope("\\");
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acpigen_write_name_dword("NVSA", gnvs_address);
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acpigen_pop_len();
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}
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