Hi Simon,
On Tue, Apr 21, 2015 at 9:52 PM, Simon Glass sjg@chromium.org wrote:
Hi Bin,
On 20 April 2015 at 22:21, Bin Meng bmeng.cn@gmail.com wrote:
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; -- 1.8.2.1
Why is this code sitting in zimage.c? Should it be used with bootm also?
Sorry I am not sure I understand your point. setup_zimage() is called by boot_prep_linux() in bootm.c.
Regards Bin