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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Vladimir Serbinenko <phcoder@gmail.com>
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Date: Fri, 28 Feb 2014 09:47:57 +0100
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Subject: [PATCH] * grub-core/kern/i386/coreboot/mmap.c: Filter out
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0xa0000-0x100000 region.
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---
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grub-core/kern/i386/coreboot/mmap.c | 38 +++++++++++++++++++++++++++++++------
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ChangeLog | 5 +++++
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2 files changed, 37 insertions(+), 6 deletions(-)
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diff --git a/grub-core/kern/i386/coreboot/mmap.c b/grub-core/kern/i386/coreboot/mmap.c
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index 11979755144..4d29f6b7d90 100644
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--- a/grub-core/kern/i386/coreboot/mmap.c
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+++ b/grub-core/kern/i386/coreboot/mmap.c
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@@ -44,18 +44,44 @@ iterate_linuxbios_table (grub_linuxbios_table_item_t table_item, void *data)
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mem_region =
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(mem_region_t) ((long) table_item +
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sizeof (struct grub_linuxbios_table_item));
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- while ((long) mem_region < (long) table_item + (long) table_item->size)
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+ for (; (long) mem_region < (long) table_item + (long) table_item->size;
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+ mem_region++)
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{
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- if (ctx->hook (mem_region->addr, mem_region->size,
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+ grub_uint64_t start = mem_region->addr;
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+ grub_uint64_t end = mem_region->addr + mem_region->size;
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+ /* Mark region 0xa0000 - 0x100000 as reserved. */
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+ if (start < 0x100000 && end >= 0xa0000
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+ && mem_region->type == GRUB_MACHINE_MEMORY_AVAILABLE)
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+ {
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+ if (start < 0xa0000
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+ && ctx->hook (start, 0xa0000 - start,
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+ /* Multiboot mmaps match with the coreboot mmap
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+ definition. Therefore, we can just pass type
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+ through. */
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+ mem_region->type,
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+ ctx->hook_data))
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+ return 1;
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+ if (start < 0xa0000)
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+ start = 0xa0000;
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+ if (start >= end)
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+ continue;
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+
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+ if (ctx->hook (start, (end > 0x100000 ? 0x100000 : end) - start,
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+ GRUB_MEMORY_RESERVED,
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+ ctx->hook_data))
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+ return 1;
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+ start = 0x100000;
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+
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+ if (end <= start)
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+ continue;
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+ }
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+ if (ctx->hook (start, end - start,
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/* Multiboot mmaps match with the coreboot mmap
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definition. Therefore, we can just pass type
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through. */
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- (((mem_region->type <= GRUB_MACHINE_MEMORY_BADRAM) && (mem_region->type >= GRUB_MACHINE_MEMORY_AVAILABLE))
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- || mem_region->type == GRUB_MEMORY_COREBOOT_TABLES) ? mem_region->type : GRUB_MEMORY_RESERVED,
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+ mem_region->type,
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ctx->hook_data))
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return 1;
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-
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- mem_region++;
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}
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return 0;
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diff --git a/ChangeLog b/ChangeLog
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index be41aa51f65..4f6f6d6d35a 100644
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--- a/ChangeLog
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+++ b/ChangeLog
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@@ -1,3 +1,8 @@
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+2014-02-28 Vladimir Serbinenko <phcoder@gmail.com>
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+
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+ * grub-core/kern/i386/coreboot/mmap.c: Filter out 0xa0000-0x100000
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+ region.
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+
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2014-02-20 Vladimir Serbinenko <phcoder@gmail.com>
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* grub-core/disk/ahci.c: Ignore NPORTS field and rely on PI
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