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Diffstat (limited to 'arch/x86/lib/zimage.c')
-rw-r--r--arch/x86/lib/zimage.c94
1 files changed, 51 insertions, 43 deletions
diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c
index d2dd6fd..8b42b5c 100644
--- a/arch/x86/lib/zimage.c
+++ b/arch/x86/lib/zimage.c
@@ -45,11 +45,11 @@
* 0x8000-0x8FFF Stack and heap
* 0x9000-0x90FF Kernel command line
*/
-#define DEFAULT_SETUP_BASE 0x90000
-#define COMMAND_LINE_OFFSET 0x9000
-#define HEAP_END_OFFSET 0x8e00
+#define DEFAULT_SETUP_BASE 0x90000
+#define COMMAND_LINE_OFFSET 0x9000
+#define HEAP_END_OFFSET 0x8e00
-#define COMMAND_LINE_SIZE 2048
+#define COMMAND_LINE_SIZE 2048
static void build_command_line(char *command_line, int auto_boot)
{
@@ -60,23 +60,20 @@ static void build_command_line(char *command_line, int auto_boot)
env_command_line = getenv("bootargs");
/* set console= argument if we use a serial console */
- if (NULL == strstr(env_command_line, "console=")) {
- if (0==strcmp(getenv("stdout"), "serial")) {
+ if (!strstr(env_command_line, "console=")) {
+ if (!strcmp(getenv("stdout"), "serial")) {
/* We seem to use serial console */
sprintf(command_line, "console=ttyS0,%s ",
- getenv("baudrate"));
+ getenv("baudrate"));
}
}
- if (auto_boot) {
+ if (auto_boot)
strcat(command_line, "auto ");
- }
- if (NULL != env_command_line) {
+ if (env_command_line)
strcat(command_line, env_command_line);
- }
-
printf("Kernel command line: \"%s\"\n", command_line);
}
@@ -90,14 +87,16 @@ void *load_zimage(char *image, unsigned long kernel_size,
int bootproto;
int big_image;
void *load_address;
+ struct setup_header *hdr;
- struct setup_header *hdr = (struct setup_header *)(image + SETUP_SECTS_OFF);
+ hdr = (struct setup_header *)(image + SETUP_SECTS_OFF);
- setup_base = (void*)DEFAULT_SETUP_BASE; /* base address for real-mode segment */
+ /* base address for real-mode segment */
+ setup_base = (void *)DEFAULT_SETUP_BASE;
if (KERNEL_MAGIC != hdr->boot_flag) {
printf("Error: Invalid Boot Flag (found 0x%04x, expected 0x%04x)\n",
- hdr->boot_flag, KERNEL_MAGIC);
+ hdr->boot_flag, KERNEL_MAGIC);
return 0;
} else {
printf("Valid Boot Flag\n");
@@ -124,43 +123,50 @@ void *load_zimage(char *image, unsigned long kernel_size,
printf("Setup Size = 0x%8.8lx\n", (ulong)setup_size);
- if (setup_size > SETUP_MAX_SIZE) {
+ if (setup_size > SETUP_MAX_SIZE)
printf("Error: Setup is too large (%d bytes)\n", setup_size);
- }
/* Determine image type */
- big_image = (bootproto >= 0x0200) && (hdr->loadflags & BIG_KERNEL_FLAG);
+ big_image = (bootproto >= 0x0200) &&
+ (hdr->loadflags & BIG_KERNEL_FLAG);
/* Determine load address */
- load_address = (void*)(big_image ? BZIMAGE_LOAD_ADDR : ZIMAGE_LOAD_ADDR);
+ load_address = (void *)(big_image ?
+ BZIMAGE_LOAD_ADDR :
+ ZIMAGE_LOAD_ADDR);
/* load setup */
- printf("Moving Real-Mode Code to 0x%8.8lx (%d bytes)\n", (ulong)setup_base, setup_size);
+ printf("Moving Real-Mode Code to 0x%8.8lx (%d bytes)\n",
+ (ulong)setup_base, setup_size);
memmove(setup_base, image, setup_size);
printf("Using boot protocol version %x.%02x\n",
(bootproto & 0xff00) >> 8, bootproto & 0xff);
if (bootproto == 0x0100) {
+ *(u16 *)(setup_base + CMD_LINE_MAGIC_OFF) = COMMAND_LINE_MAGIC;
+ *(u16 *)(setup_base + CMD_LINE_OFFSET_OFF) = COMMAND_LINE_OFFSET;
- *(u16*)(setup_base + CMD_LINE_MAGIC_OFF) = COMMAND_LINE_MAGIC;
- *(u16*)(setup_base + CMD_LINE_OFFSET_OFF) = COMMAND_LINE_OFFSET;
-
- /* A very old kernel MUST have its real-mode code
- * loaded at 0x90000 */
-
+ /*
+ * A very old kernel MUST have its real-mode code
+ * loaded at 0x90000
+ */
if ((u32)setup_base != 0x90000) {
/* Copy the real-mode kernel */
- memmove((void*)0x90000, setup_base, setup_size);
+ memmove((void *)0x90000, setup_base, setup_size);
+
/* Copy the command line */
- memmove((void*)0x99000, setup_base+COMMAND_LINE_OFFSET,
- COMMAND_LINE_SIZE);
+ memmove((void *)0x99000,
+ setup_base + COMMAND_LINE_OFFSET,
+ COMMAND_LINE_SIZE);
- setup_base = (void*)0x90000; /* Relocated */
+ /* Relocated */
+ setup_base = (void *)0x90000;
}
/* It is recommended to clear memory up to the 32K mark */
- memset((void*)0x90000 + setup_size, 0, SETUP_MAX_SIZE-setup_size);
+ memset((void *)0x90000 + setup_size, 0,
+ SETUP_MAX_SIZE-setup_size);
}
/* We are now setting up the real-mode version of the header */
@@ -170,8 +176,9 @@ void *load_zimage(char *image, unsigned long kernel_size,
hdr->type_of_loader = 8;
if (hdr->setup_sects >= 15)
- printf("Linux kernel version %s\n", (char *)
- (setup_base + (hdr->kernel_version + 0x200)));
+ printf("Linux kernel version %s\n",
+ (char *)(setup_base +
+ (hdr->kernel_version + 0x200)));
else
printf("Setup Sectors < 15 - Cannot print kernel version.\n");
@@ -193,8 +200,8 @@ void *load_zimage(char *image, unsigned long kernel_size,
hdr->cmd_line_ptr = (u32)setup_base + COMMAND_LINE_OFFSET;
} else if (bootproto >= 0x0200) {
- *(u16*)(setup_base + CMD_LINE_MAGIC_OFF) = COMMAND_LINE_MAGIC;
- *(u16*)(setup_base + CMD_LINE_OFFSET_OFF) = COMMAND_LINE_OFFSET;
+ *(u16 *)(setup_base + CMD_LINE_MAGIC_OFF) = COMMAND_LINE_MAGIC;
+ *(u16 *)(setup_base + CMD_LINE_OFFSET_OFF) = COMMAND_LINE_OFFSET;
hdr->setup_move_size = 0x9100;
}
@@ -221,8 +228,8 @@ void *load_zimage(char *image, unsigned long kernel_size,
/* build command line at COMMAND_LINE_OFFSET */
build_command_line(setup_base + COMMAND_LINE_OFFSET, auto_boot);
- printf("Loading %czImage at address 0x%08x (%ld bytes)\n", big_image ? 'b' : ' ',
- (u32)load_address, kernel_size);
+ printf("Loading %czImage at address 0x%08x (%ld bytes)\n",
+ big_image ? 'b' : ' ', (u32)load_address, kernel_size);
memmove(load_address, image + setup_size, kernel_size);
@@ -241,10 +248,11 @@ void boot_zimage(void *setup_base)
regs.xss = regs.xds;
regs.esp = 0x9000;
regs.eflags = 0;
- enter_realmode(((u32)setup_base+SETUP_START_OFFSET)>>4, 0, &regs, &regs);
+ enter_realmode(((u32)setup_base+SETUP_START_OFFSET)>>4, 0, &regs,
+ &regs);
}
-int do_zboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+int do_zboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
void *base_ptr;
void *bzImage_addr = NULL;
@@ -270,12 +278,12 @@ int do_zboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
bzImage_size = simple_strtoul(argv[2], NULL, 16);
/* Lets look for*/
- base_ptr = load_zimage (bzImage_addr, bzImage_size, 0, 0, 0);
+ base_ptr = load_zimage(bzImage_addr, bzImage_size, 0, 0, 0);
- if (NULL == base_ptr) {
- printf ("## Kernel loading failed ...\n");
+ if (!base_ptr) {
+ printf("## Kernel loading failed ...\n");
} else {
- printf ("## Transferring control to Linux (at address %08x) ...\n",
+ printf("## Transferring control to Linux (at address %08x) ...\n",
(u32)base_ptr);
/* we assume that the kernel is in place */
generated by cgit v1.1 at 2024-12-01 02:34:01 +0000