diff options
| -rw-r--r-- | common/cmd_elf.c | 30 | ||||
| -rw-r--r-- | include/vxworks.h | 29 |
2 files changed, 59 insertions, 0 deletions
diff --git a/common/cmd_elf.c b/common/cmd_elf.c index da70ef3..d6a2036 100644 --- a/common/cmd_elf.c +++ b/common/cmd_elf.c @@ -18,6 +18,9 @@ #include <elf.h> #include <net.h> #include <vxworks.h> +#ifdef CONFIG_X86 +#include <asm/e820.h> +#endif /* * A very simple elf loader, assumes the image is valid, returns the @@ -214,6 +217,10 @@ int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) char *tmp; /* Temporary char pointer */ char build_buf[128]; /* Buffer for building the bootline */ int ptr = 0; +#ifdef CONFIG_X86 + struct e820info *info; + struct e820entry *data; +#endif /* * Check the loadaddr variable. @@ -336,6 +343,29 @@ int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) (char *)bootaddr); } +#ifdef CONFIG_X86 + /* + * Since E820 information is critical to the kernel, if we don't + * specify these in the environments, use a default one. + */ + tmp = getenv("e820data"); + if (tmp) + data = (struct e820entry *)simple_strtoul(tmp, NULL, 16); + else + data = (struct e820entry *)VXWORKS_E820_DATA_ADDR; + tmp = getenv("e820info"); + if (tmp) + info = (struct e820info *)simple_strtoul(tmp, NULL, 16); + else + info = (struct e820info *)VXWORKS_E820_INFO_ADDR; + + memset(info, 0, sizeof(struct e820info)); + info->sign = E820_SIGNATURE; + info->entries = install_e820_map(E820MAX, data); + info->addr = (info->entries - 1) * sizeof(struct e820entry) + + VXWORKS_E820_DATA_ADDR; +#endif + /* * If the data at the load address is an elf image, then * treat it like an elf image. Otherwise, assume that it is a diff --git a/include/vxworks.h b/include/vxworks.h index 297a70f..f69b008 100644 --- a/include/vxworks.h +++ b/include/vxworks.h @@ -8,6 +8,35 @@ #ifndef _VXWORKS_H_ #define _VXWORKS_H_ +/* + * VxWorks x86 E820 related stuff + * + * VxWorks on x86 gets E820 information from pre-defined address @ + * 0x4a00 and 0x4000. At 0x4a00 it's an information table defined + * by VxWorks and the actual E820 table entries starts from 0x4000. + * As defined by the BIOS E820 spec, the maximum number of E820 table + * entries is 128 and each entry occupies 20 bytes, so it's 128 * 20 + * = 2560 (0xa00) bytes in total. That's where VxWorks stores some + * information that is retrieved from the BIOS E820 call and saved + * later for sanity test during the kernel boot-up. + */ +#define VXWORKS_E820_DATA_ADDR 0x4000 +#define VXWORKS_E820_INFO_ADDR 0x4a00 + +/* E820 info signatiure "SMAP" - System MAP */ +#define E820_SIGNATURE 0x534d4150 + +struct e820info { + u32 sign; /* "SMAP" signature */ + u32 x0; /* don't care, used by VxWorks */ + u32 x1; /* don't care, used by VxWorks */ + u32 x2; /* don't care, used by VxWorks */ + u32 addr; /* last e820 table entry addr */ + u32 x3; /* don't care, used by VxWorks */ + u32 entries; /* e820 table entry count */ + u32 error; /* must be zero */ +}; + int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); void boot_prep_vxworks(bootm_headers_t *images); void boot_jump_vxworks(bootm_headers_t *images); |