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kern/acpi: Export a generic grub_acpi_find_table()

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And convert grub_acpi_find_fadt() to use it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Benjamin Herrenschmidt 2022-12-23 12:47:52 +11:00 committed by Daniel Kiper
parent 1a241e0506
commit cff78b3b61
2 changed files with 29 additions and 18 deletions
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44
grub-core/kern/acpi.c
View File

@ -19,6 +19,7 @@
#include <grub/types.h>
#include <grub/time.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/acpi.h>
/* Simple checksum by summing all bytes. Used by ACPI and SMBIOS. */
@ -85,35 +86,42 @@ grub_acpi_xsdt_find_table (struct grub_acpi_table_header *xsdt, const char *sig)
return 0;
}
struct grub_acpi_fadt *
grub_acpi_find_fadt (void)
void *
grub_acpi_find_table (const char *sig)
{
struct grub_acpi_fadt *fadt = 0;
struct grub_acpi_fadt *r = NULL;
struct grub_acpi_rsdp_v10 *rsdpv1;
struct grub_acpi_rsdp_v20 *rsdpv2;
rsdpv1 = grub_machine_acpi_get_rsdpv1 ();
if (rsdpv1)
fadt = grub_acpi_rsdt_find_table ((struct grub_acpi_table_header *)
(grub_addr_t) rsdpv1->rsdt_addr,
GRUB_ACPI_FADT_SIGNATURE);
if (fadt)
return fadt;
r = grub_acpi_rsdt_find_table ((struct grub_acpi_table_header *)
(grub_addr_t) rsdpv1->rsdt_addr,
sig);
if (r)
return r;
rsdpv2 = grub_machine_acpi_get_rsdpv2 ();
if (rsdpv2)
fadt = grub_acpi_rsdt_find_table ((struct grub_acpi_table_header *)
(grub_addr_t) rsdpv2->rsdpv1.rsdt_addr,
GRUB_ACPI_FADT_SIGNATURE);
if (fadt)
return fadt;
r = grub_acpi_rsdt_find_table ((struct grub_acpi_table_header *)
(grub_addr_t) rsdpv2->rsdpv1.rsdt_addr,
sig);
if (r)
return r;
if (rsdpv2
#if GRUB_CPU_SIZEOF_VOID_P != 8
&& !(rsdpv2->xsdt_addr >> 32)
#endif
)
fadt = grub_acpi_xsdt_find_table ((struct grub_acpi_table_header *)
(grub_addr_t) rsdpv2->xsdt_addr,
GRUB_ACPI_FADT_SIGNATURE);
if (fadt)
return fadt;
r = grub_acpi_xsdt_find_table ((struct grub_acpi_table_header *)
(grub_addr_t) rsdpv2->xsdt_addr,
sig);
if (r)
return r;
return 0;
}
struct grub_acpi_fadt *
grub_acpi_find_fadt (void)
{
return grub_acpi_find_table (GRUB_ACPI_FADT_SIGNATURE);
}

3
include/grub/acpi.h
View File

@ -244,4 +244,7 @@ enum
struct grub_acpi_fadt *
EXPORT_FUNC(grub_acpi_find_fadt) (void);
void *
EXPORT_FUNC(grub_acpi_find_table) (const char *sig);
#endif /* ! GRUB_ACPI_HEADER */