Differential D26125 Diff 76012 head/sys/amd64/acpica/acpi_machdep.c

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head/sys/amd64/acpica/acpi_machdep.c

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int		int
acpi_machdep_quirks(int *quirks)		acpi_machdep_quirks(int *quirks)
{		{

return (0);		return (0);
}		}

/*		/*
* Support for mapping ACPI tables during early boot. Currently this		* Map a table. First map the header to determine the table length and then map
* uses the crashdump map to map each table. However, the crashdump		* the entire table.
* map is created in pmap_bootstrap() right after the direct map, so
* we should be able to just use pmap_mapbios() here instead.
*
* This makes the following assumptions about how we use this KVA:
* pages 0 and 1 are used to map in the header of each table found via
* the RSDT or XSDT and pages 2 to n are used to map in the RSDT or
* XSDT. This has to use 2 pages for the table headers in case a
* header spans a page boundary.
*
* XXX: We don't ensure the table fits in the available address space
* in the crashdump map.
*/		*/

/*
* Map some memory using the crashdump map. 'offset' is an offset in
* pages into the crashdump map to use for the start of the mapping.
*/
static void *		static void *
table_map(vm_paddr_t pa, int offset, vm_offset_t length)		map_table(vm_paddr_t pa, const char *sig)
{		{
vm_offset_t va, off;
void *data;

off = pa & PAGE_MASK;
length = round_page(length + off);
pa = pa & PG_FRAME;
va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
(offset * PAGE_SIZE);
data = (void *)(va + off);
length -= PAGE_SIZE;
while (length > 0) {
va += PAGE_SIZE;
pa += PAGE_SIZE;
length -= PAGE_SIZE;
pmap_kenter(va, pa);
invlpg(va);
}
return (data);
}

/* Unmap memory previously mapped with table_map(). */
static void
table_unmap(void *data, vm_offset_t length)
{
vm_offset_t va, off;

va = (vm_offset_t)data;
off = va & PAGE_MASK;
length = round_page(length + off);
va &= ~PAGE_MASK;
while (length > 0) {
pmap_kremove(va);
invlpg(va);
va += PAGE_SIZE;
length -= PAGE_SIZE;
}
}

/*
* Map a table at a given offset into the crashdump map. It first
* maps the header to determine the table length and then maps the
* entire table.
*/
static void *
map_table(vm_paddr_t pa, int offset, const char *sig)
{
ACPI_TABLE_HEADER *header;		ACPI_TABLE_HEADER *header;
vm_offset_t length;		vm_offset_t length;
void *table;		void *table;

header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));		header = pmap_mapbios(pa, sizeof(ACPI_TABLE_HEADER));
if (strncmp(header->Signature, sig, ACPI_NAMESEG_SIZE) != 0) {		if (strncmp(header->Signature, sig, ACPI_NAMESEG_SIZE) != 0) {
table_unmap(header, sizeof(ACPI_TABLE_HEADER));		pmap_unmapbios((vm_offset_t)header, sizeof(ACPI_TABLE_HEADER));
return (NULL);		return (NULL);
}		}
length = header->Length;		length = header->Length;
table_unmap(header, sizeof(ACPI_TABLE_HEADER));		pmap_unmapbios((vm_offset_t)header, sizeof(ACPI_TABLE_HEADER));
table = table_map(pa, offset, length);		table = pmap_mapbios(pa, length);
if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {		if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
if (bootverbose)		if (bootverbose)
printf("ACPI: Failed checksum for table %s\n", sig);		printf("ACPI: Failed checksum for table %s\n", sig);
#if (ACPI_CHECKSUM_ABORT)		#if (ACPI_CHECKSUM_ABORT)
table_unmap(table, length);		pmap_unmapbios((vm_offset_t)table, length);
return (NULL);		return (NULL);
#endif		#endif
}		}
return (table);		return (table);
}		}

/*		/*
* See if a given ACPI table is the requested table. Returns the		* See if a given ACPI table is the requested table. Returns the
* length of the able if it matches or zero on failure.		* length of the able if it matches or zero on failure.
*/		*/
static int		static int
probe_table(vm_paddr_t address, const char *sig)		probe_table(vm_paddr_t address, const char *sig)
{		{
ACPI_TABLE_HEADER *table;		ACPI_TABLE_HEADER *table;
		int ret;

table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));		table = pmap_mapbios(address, sizeof(ACPI_TABLE_HEADER));
if (table == NULL) {		ret = strncmp(table->Signature, sig, ACPI_NAMESEG_SIZE) == 0;
if (bootverbose)		pmap_unmapbios((vm_offset_t)table, sizeof(ACPI_TABLE_HEADER));
printf("ACPI: Failed to map table at 0x%jx\n",		return (ret);
(uintmax_t)address);
return (0);
}		}

if (strncmp(table->Signature, sig, ACPI_NAMESEG_SIZE) != 0) {
table_unmap(table, sizeof(ACPI_TABLE_HEADER));
return (0);
}
table_unmap(table, sizeof(ACPI_TABLE_HEADER));
return (1);
}

/*		/*
* Try to map a table at a given physical address previously returned		* Try to map a table at a given physical address previously returned
* by acpi_find_table().		* by acpi_find_table().
*/		*/
void *		void *
acpi_map_table(vm_paddr_t pa, const char *sig)		acpi_map_table(vm_paddr_t pa, const char *sig)
{		{

return (map_table(pa, 0, sig));		return (map_table(pa, sig));
}		}

/* Unmap a table previously mapped via acpi_map_table(). */		/* Unmap a table previously mapped via acpi_map_table(). */
void		void
acpi_unmap_table(void *table)		acpi_unmap_table(void *table)
{		{
ACPI_TABLE_HEADER *header;		ACPI_TABLE_HEADER *header;

header = (ACPI_TABLE_HEADER *)table;		header = (ACPI_TABLE_HEADER *)table;
table_unmap(table, header->Length);		pmap_unmapbios((vm_offset_t)table, header->Length);
}		}

/*		/*
* Return the physical address of the requested table or zero if one		* Return the physical address of the requested table or zero if one
* is not found.		* is not found.
*/		*/
vm_paddr_t		vm_paddr_t
acpi_find_table(const char *sig)		acpi_find_table(const char *sig)
Show All 20 Lines	acpi_find_table(const char *sig)
if (rsdp == NULL) {		if (rsdp == NULL) {
if (bootverbose)		if (bootverbose)
printf("ACPI: Failed to map RSDP\n");		printf("ACPI: Failed to map RSDP\n");
return (0);		return (0);
}		}

/*		/*
* For ACPI >= 2.0, use the XSDT if it is available.		* For ACPI >= 2.0, use the XSDT if it is available.
* Otherwise, use the RSDT. We map the XSDT or RSDT at page 2		* Otherwise, use the RSDT.
* in the crashdump area. Pages 0 and 1 are used to map in the
* headers of candidate ACPI tables.
*/		*/
addr = 0;		addr = 0;
if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {		if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
/*		/*
* AcpiOsGetRootPointer only verifies the checksum for		* AcpiOsGetRootPointer only verifies the checksum for
* the version 1.0 portion of the RSDP. Version 2.0 has		* the version 1.0 portion of the RSDP. Version 2.0 has
* an additional checksum that we verify first.		* an additional checksum that we verify first.
*/		*/
if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {		if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
if (bootverbose)		if (bootverbose)
printf("ACPI: RSDP failed extended checksum\n");		printf("ACPI: RSDP failed extended checksum\n");
return (0);		return (0);
}		}
xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);		xsdt = map_table(rsdp->XsdtPhysicalAddress, ACPI_SIG_XSDT);
if (xsdt == NULL) {		if (xsdt == NULL) {
if (bootverbose)		if (bootverbose)
printf("ACPI: Failed to map XSDT\n");		printf("ACPI: Failed to map XSDT\n");
return (0);		return (0);
}		}
count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /		count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
sizeof(UINT64);		sizeof(UINT64);
for (i = 0; i < count; i++)		for (i = 0; i < count; i++)
if (probe_table(xsdt->TableOffsetEntry[i], sig)) {		if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
addr = xsdt->TableOffsetEntry[i];		addr = xsdt->TableOffsetEntry[i];
break;		break;
}		}
acpi_unmap_table(xsdt);		acpi_unmap_table(xsdt);
} else {		} else {
rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);		rsdt = map_table(rsdp->RsdtPhysicalAddress, ACPI_SIG_RSDT);
if (rsdt == NULL) {		if (rsdt == NULL) {
if (bootverbose)		if (bootverbose)
printf("ACPI: Failed to map RSDT\n");		printf("ACPI: Failed to map RSDT\n");
return (0);		return (0);
}		}
count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /		count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
sizeof(UINT32);		sizeof(UINT32);
for (i = 0; i < count; i++)		for (i = 0; i < count; i++)
if (probe_table(rsdt->TableOffsetEntry[i], sig)) {		if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
addr = rsdt->TableOffsetEntry[i];		addr = rsdt->TableOffsetEntry[i];
break;		break;
}		}
acpi_unmap_table(rsdt);		acpi_unmap_table(rsdt);
}		}
pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));		pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
if (addr == 0)		if (addr == 0)
return (0);		return (0);

/*		/*
* Verify that we can map the full table and that its checksum is		* Verify that we can map the full table and that its checksum is
* correct, etc.		* correct, etc.
*/		*/
table = map_table(addr, 0, sig);		table = map_table(addr, sig);
if (table == NULL)		if (table == NULL)
return (0);		return (0);
acpi_unmap_table(table);		acpi_unmap_table(table);

return (addr);		return (addr);
}		}

/*		/*
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