[PATCH] Fix PkgLength calculation for the SSDT.
Magnus Christensson
mch at virtutech.com
Wed Nov 25 16:26:58 CET 2009
Signed-off-by: Magnus Christensson <mch at virtutech.com>
---
src/acpi.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/acpi.c b/src/acpi.c
index f613b03..244536a 100644
--- a/src/acpi.c
+++ b/src/acpi.c
@@ -429,10 +429,12 @@ build_ssdt(void)
// build processor scope header
*(ssdt_ptr++) = 0x10; // ScopeOp
if (cpu_length <= 0x3e) {
+ /* Handle 1-4 CPUs with one byte encoding */
*(ssdt_ptr++) = cpu_length + 1;
} else {
- *(ssdt_ptr++) = 0x7F;
- *(ssdt_ptr++) = (cpu_length + 2) >> 6;
+ /* Handle 5-314 CPUs with two byte encoding */
+ *(ssdt_ptr++) = 0x40 | ((cpu_length + 2) & 0xf);
+ *(ssdt_ptr++) = (cpu_length + 2) >> 4;
}
*(ssdt_ptr++) = '_'; // Name
*(ssdt_ptr++) = 'P';
--
1.6.2.5
--------------010908080004080305080203--
More information about the SeaBIOS
mailing list