From 9fb3f4d950744e97cc655b7d7b523d8bf101e4a0 Mon Sep 17 00:00:00 2001

From: Magnus Christensson <mch@virtutech.com>

Date: Wed, 25 Nov 2009 16:26:58 +0100

Subject: [PATCH] Fix PkgLength calculation for the SSDT.

Signed-off-by: Magnus Christensson <mch@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';

-- 

1.6.6.1