Patchwork Seabios: Fix PkgLength calculation for the SSDT.

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Submitter Magnus Christensson
Date 2009-11-26 12:22:14
Message ID <4B0E72F6.3060502@virtutech.com>
Download mbox | patch
Permalink /patch/603/
State Not Applicable
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Comments

Magnus Christensson - 2009-11-26 12:22:14
See attached patch.

M.

Patch

From d9dc0f50b2ce756e8a3b4ede0a8ecbe76f2afcb8 Mon Sep 17 00:00:00 2001
From: Magnus Christensson <mch@virtutech.com>
Date: Wed, 25 Nov 2009 16:26:58 +0100
Subject: [PATCH 13/13] 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 843af69..88007ae 100644
--- a/src/acpi.c
+++ b/src/acpi.c
@@ -464,10 +464,12 @@  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 + 1) & 0xf);
+        *(ssdt_ptr++) = (cpu_length + 1) >> 4;
     }
     *(ssdt_ptr++) = '_'; // Name
     *(ssdt_ptr++) = 'P';
-- 
1.6.2.5