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 ---
arch/x86/lib/zimage.c | 29 ++++++++++++++++++++++------- 1 file 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;