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Squashed todo: only compute the numEntries once, and made it static.

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35889 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stefano Ceccherini
2010-03-17 12:19:34 +00:00
parent 770ebceafa
commit 33e11f7c0f
1 changed files with 7 additions and 8 deletions
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src/system/boot/platform/bios_ia32/acpi.cpp
+7 -8
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@@ -33,7 +33,7 @@ static struct scan_spots_struct acpi_scan_spots[] = {
};
static acpi_descriptor_header *sAcpiRsdt; // System Description Table
static int32 sNumEntries = -1;
static status_t
acpi_check_rsdt(acpi_rsdp *rsdp)
@@ -63,22 +63,21 @@ acpi_find_table(const char *signature)
if (sAcpiRsdt == NULL)
return NULL;
// Tried to keep numEntries a static variable; kept turning up 0 on table
// scan
// TODO: This calculates numEntries for every acpi probe.
int32 numEntries = (sAcpiRsdt->length - sizeof(acpi_descriptor_header)) / 4;
if (numEntries <= 0) {
if (sNumEntries == -1)
sNumEntries = (sAcpiRsdt->length - sizeof(acpi_descriptor_header)) / 4;
if (sNumEntries <= 0) {
TRACE(("acpi: root system description table is empty\n"));
return NULL;
}
TRACE(("acpi: searching %ld entries for table '%.4s'\n", numEntries,
TRACE(("acpi: searching %ld entries for table '%.4s'\n", sNumEntries,
signature));
uint32 *pointer = (uint32 *)((uint8 *)sAcpiRsdt
+ sizeof(acpi_descriptor_header));
for (int32 j = 0; j < numEntries; j++, pointer++) {
for (int32 j = 0; j < sNumEntries; j++, pointer++) {
acpi_descriptor_header *header = (acpi_descriptor_header *)
mmu_map_physical_memory(*pointer, sizeof(acpi_descriptor_header),
kDefaultPageFlags);