33 lines
1.0 KiB
Diff
33 lines
1.0 KiB
Diff
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From 9fb3f4d950744e97cc655b7d7b523d8bf101e4a0 Mon Sep 17 00:00:00 2001
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From: Magnus Christensson <mch@virtutech.com>
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Date: Wed, 25 Nov 2009 16:26:58 +0100
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Subject: [PATCH] Fix PkgLength calculation for the SSDT.
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Signed-off-by: Magnus Christensson <mch@virtutech.com>
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---
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src/acpi.c | 6 ++++--
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1 files changed, 4 insertions(+), 2 deletions(-)
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diff --git a/src/acpi.c b/src/acpi.c
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index f613b03..244536a 100644
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--- a/src/acpi.c
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+++ b/src/acpi.c
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@@ -429,10 +429,12 @@ build_ssdt(void)
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// build processor scope header
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*(ssdt_ptr++) = 0x10; // ScopeOp
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if (cpu_length <= 0x3e) {
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+ /* Handle 1-4 CPUs with one byte encoding */
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*(ssdt_ptr++) = cpu_length + 1;
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} else {
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- *(ssdt_ptr++) = 0x7F;
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- *(ssdt_ptr++) = (cpu_length + 2) >> 6;
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+ /* Handle 5-314 CPUs with two byte encoding */
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+ *(ssdt_ptr++) = 0x40 | ((cpu_length + 2) & 0xf);
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+ *(ssdt_ptr++) = (cpu_length + 2) >> 4;
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}
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*(ssdt_ptr++) = '_'; // Name
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*(ssdt_ptr++) = 'P';
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--
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1.6.6.1
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