diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2015-04-21 12:21:36 +0800 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-04-29 18:51:49 -0600 |
| commit | 54c6001bbac1cb3b6b85605d115e5f73ef1ab198 (patch) | |
| tree | a0148b7a2b3a8319e0cf09204b51f498eafdd2a1 /arch/x86 | |
| parent | 24ff8e70e1c989c3beeb3c0e97fd2e411c6b7ccd (diff) | |
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>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/lib/zimage.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c index 566b048c88..c3f8a7308f 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; |