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Add acpi_find_table() -- a convenience function for looking up an

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ACPI table given the signature.
This commit is contained in:
marcel 2010-07-07 20:07:33 +00:00
parent f2502957ba
commit d729021fb8
2 changed files with 38 additions and 2 deletions
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39
sys/ia64/acpica/acpi_machdep.c
View File

@ -28,11 +28,12 @@
#include <sys/param.h>
#include <sys/bus.h>
#include <machine/md_var.h>
#include <machine/pal.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/actables.h>
#include <dev/acpica/acpivar.h>
#include <machine/pal.h>
int
acpi_machdep_init(device_t dev)
@ -57,3 +58,37 @@ acpi_cpu_c1()
{
ia64_call_pal_static(PAL_HALT_LIGHT, 0, 0, 0);
}
void *
acpi_find_table(const char *sig)
{
ACPI_PHYSICAL_ADDRESS rsdp_ptr;
ACPI_TABLE_RSDP *rsdp;
ACPI_TABLE_XSDT *xsdt;
ACPI_TABLE_HEADER *table;
UINT64 addr;
u_int i, count;
if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
return (NULL);
rsdp = (ACPI_TABLE_RSDP *)IA64_PHYS_TO_RR7(rsdp_ptr);
xsdt = (ACPI_TABLE_XSDT *)IA64_PHYS_TO_RR7(rsdp->XsdtPhysicalAddress);
count = (UINT64 *)((char *)xsdt + xsdt->Header.Length) -
xsdt->TableOffsetEntry;
for (i = 0; i < count; i++) {
addr = xsdt->TableOffsetEntry[i];
table = (ACPI_TABLE_HEADER *)IA64_PHYS_TO_RR7(addr);
if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0)
continue;
if (ACPI_FAILURE(AcpiTbChecksum((void *)table, table->Length)))
continue;
return (table);
}
return (NULL);
}

1
sys/ia64/include/md_var.h
View File

@ -77,6 +77,7 @@ extern uint64_t ia64_lapic_addr;
extern long Maxmem;
extern u_int busdma_swi_pending;
void *acpi_find_table(const char *sig);
void busdma_swi(void);
int copyout_regstack(struct thread *, uint64_t *, uint64_t *);
void cpu_mp_add(u_int, u_int, u_int);