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authorBin Meng <bmeng.cn@gmail.com>2015-04-21 12:21:36 +0800
committerSimon Glass <sjg@chromium.org>2015-04-29 18:51:49 -0600
commit54c6001bbac1cb3b6b85605d115e5f73ef1ab198 (patch)
treea0148b7a2b3a8319e0cf09204b51f498eafdd2a1
parent24ff8e70e1c989c3beeb3c0e97fd2e411c6b7ccd (diff)
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x86: Install a default e820 table in the __weak install_e820_map()
Create a default e820 table with 3 entries which is enough to boot a Linux kernel. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
-rw-r--r--arch/x86/lib/zimage.c29
1 files changed, 22 insertions, 7 deletions
diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c
index 566b048..c3f8a73 100644
--- a/arch/x86/lib/zimage.c
+++ b/arch/x86/lib/zimage.c
@@ -25,6 +25,8 @@
#endif
#include <linux/compiler.h>
+DECLARE_GLOBAL_DATA_PTR;
+
/*
* Memory lay-out:
*
@@ -40,16 +42,29 @@
#define COMMAND_LINE_SIZE 2048
-unsigned generic_install_e820_map(unsigned max_entries,
- struct e820entry *entries)
+/*
+ * Install a default e820 table with 3 entries as follows:
+ *
+ * 0x000000-0x0a0000 Useable RAM
+ * 0x0a0000-0x100000 Reserved for ISA
+ * 0x100000-gd->ram_size Useable RAM
+ */
+__weak unsigned install_e820_map(unsigned max_entries,
+ struct e820entry *entries)
{
- return 0;
+ entries[0].addr = 0;
+ entries[0].size = ISA_START_ADDRESS;
+ entries[0].type = E820_RAM;
+ entries[1].addr = ISA_START_ADDRESS;
+ entries[1].size = ISA_END_ADDRESS - ISA_START_ADDRESS;
+ entries[1].type = E820_RESERVED;
+ entries[2].addr = ISA_END_ADDRESS;
+ entries[2].size = gd->ram_size - ISA_END_ADDRESS;
+ entries[2].type = E820_RAM;
+
+ return 3;
}
-unsigned install_e820_map(unsigned max_entries,
- struct e820entry *entries)
- __attribute__((weak, alias("generic_install_e820_map")));
-
static void build_command_line(char *command_line, int auto_boot)
{
char *env_command_line;