#include "ops.h"
#include "gunzip_util.h"
#include "flatdevtree.h"
-
-extern void flush_cache(void *, unsigned long);
+#include "reg.h"
extern char _start[];
extern char __bss_start[];
unsigned long size;
};
-struct elf_info {
- unsigned long loadsize;
- unsigned long memsize;
- unsigned long elfoffset;
-};
-
typedef void (*kernel_entry_t)(unsigned long, unsigned long, void *);
#undef DEBUG
-static int parse_elf64(void *hdr, struct elf_info *info)
-{
- Elf64_Ehdr *elf64 = hdr;
- Elf64_Phdr *elf64ph;
- unsigned int i;
-
- if (!(elf64->e_ident[EI_MAG0] == ELFMAG0 &&
- elf64->e_ident[EI_MAG1] == ELFMAG1 &&
- elf64->e_ident[EI_MAG2] == ELFMAG2 &&
- elf64->e_ident[EI_MAG3] == ELFMAG3 &&
- elf64->e_ident[EI_CLASS] == ELFCLASS64 &&
- elf64->e_ident[EI_DATA] == ELFDATA2MSB &&
- elf64->e_type == ET_EXEC &&
- elf64->e_machine == EM_PPC64))
- return 0;
-
- elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
- (unsigned long)elf64->e_phoff);
- for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
- if (elf64ph->p_type == PT_LOAD)
- break;
- if (i >= (unsigned int)elf64->e_phnum)
- return 0;
-
- info->loadsize = (unsigned long)elf64ph->p_filesz;
- info->memsize = (unsigned long)elf64ph->p_memsz;
- info->elfoffset = (unsigned long)elf64ph->p_offset;
-
- return 1;
-}
-
-static int parse_elf32(void *hdr, struct elf_info *info)
-{
- Elf32_Ehdr *elf32 = hdr;
- Elf32_Phdr *elf32ph;
- unsigned int i;
-
- if (!(elf32->e_ident[EI_MAG0] == ELFMAG0 &&
- elf32->e_ident[EI_MAG1] == ELFMAG1 &&
- elf32->e_ident[EI_MAG2] == ELFMAG2 &&
- elf32->e_ident[EI_MAG3] == ELFMAG3 &&
- elf32->e_ident[EI_CLASS] == ELFCLASS32 &&
- elf32->e_ident[EI_DATA] == ELFDATA2MSB &&
- elf32->e_type == ET_EXEC &&
- elf32->e_machine == EM_PPC))
- return 0;
-
- elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
- for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
- if (elf32ph->p_type == PT_LOAD)
- break;
- if (i >= elf32->e_phnum)
- return 0;
-
- info->loadsize = elf32ph->p_filesz;
- info->memsize = elf32ph->p_memsz;
- info->elfoffset = elf32ph->p_offset;
- return 1;
-}
-
static struct addr_range prep_kernel(void)
{
char elfheader[256];
gunzip_start(&gzstate, vmlinuz_addr, vmlinuz_size);
gunzip_exactly(&gzstate, elfheader, sizeof(elfheader));
- if (!parse_elf64(elfheader, &ei) && !parse_elf32(elfheader, &ei)) {
- printf("Error: not a valid PPC32 or PPC64 ELF file!\n\r");
- exit();
- }
+ if (!parse_elf64(elfheader, &ei) && !parse_elf32(elfheader, &ei))
+ fatal("Error: not a valid PPC32 or PPC64 ELF file!\n\r");
+
if (platform_ops.image_hdr)
platform_ops.image_hdr(elfheader);
if (platform_ops.vmlinux_alloc) {
addr = platform_ops.vmlinux_alloc(ei.memsize);
} else {
- if ((unsigned long)_start < ei.memsize) {
- printf("Insufficient memory for kernel at address 0!"
- " (_start=%lx)\n\r", _start);
- exit();
- }
+ if ((unsigned long)_start < ei.memsize)
+ fatal("Insufficient memory for kernel at address 0!"
+ " (_start=%p)\n\r", _start);
}
/* Finally, gunzip the kernel */
vmlinuz_addr, vmlinuz_addr+vmlinuz_size);
/* discard up to the actual load data */
gunzip_discard(&gzstate, ei.elfoffset - sizeof(elfheader));
- len = gunzip_finish(&gzstate, addr, ei.memsize);
- printf("done 0x%lx bytes\n\r", len);
+ len = gunzip_finish(&gzstate, addr, ei.loadsize);
+ if (len != ei.loadsize)
+ fatal("ran out of data! only got 0x%x of 0x%lx bytes.\n\r",
+ len, ei.loadsize);
+ printf("done 0x%x bytes\n\r", len);
flush_cache(addr, ei.loadsize);
return (struct addr_range){addr, ei.memsize};
}
-static struct addr_range prep_initrd(struct addr_range vmlinux,
+static struct addr_range prep_initrd(struct addr_range vmlinux, void *chosen,
unsigned long initrd_addr,
unsigned long initrd_size)
{
- void *devp;
- u32 initrd_start, initrd_end;
-
/* If we have an image attached to us, it overrides anything
* supplied by the loader. */
if (_initrd_end > _initrd_start) {
printf("Allocating 0x%lx bytes for initrd ...\n\r",
initrd_size);
initrd_addr = (unsigned long)malloc(initrd_size);
- if (! initrd_addr) {
- printf("Can't allocate memory for initial "
+ if (! initrd_addr)
+ fatal("Can't allocate memory for initial "
"ramdisk !\n\r");
- exit();
- }
- printf("Relocating initrd 0x%p <- 0x%p (0x%lx bytes)\n\r",
+ printf("Relocating initrd 0x%lx <- 0x%p (0x%lx bytes)\n\r",
initrd_addr, old_addr, initrd_size);
memmove((void *)initrd_addr, old_addr, initrd_size);
}
printf("initrd head: 0x%lx\n\r", *((unsigned long *)initrd_addr));
/* Tell the kernel initrd address via device tree */
- devp = finddevice("/chosen");
- if (! devp) {
- printf("Device tree has no chosen node!\n\r");
- exit();
- }
-
- initrd_start = (u32)initrd_addr;
- initrd_end = (u32)initrd_addr + initrd_size;
-
- setprop(devp, "linux,initrd-start", &initrd_start,
- sizeof(initrd_start));
- setprop(devp, "linux,initrd-end", &initrd_end, sizeof(initrd_end));
+ setprop_val(chosen, "linux,initrd-start", (u32)(initrd_addr));
+ setprop_val(chosen, "linux,initrd-end", (u32)(initrd_addr+initrd_size));
return (struct addr_range){(void *)initrd_addr, initrd_size};
}
* edit the command line passed to vmlinux (by setting /chosen/bootargs).
* The buffer is put in it's own section so that tools may locate it easier.
*/
-static char builtin_cmdline[COMMAND_LINE_SIZE]
+static char cmdline[COMMAND_LINE_SIZE]
__attribute__((__section__("__builtin_cmdline")));
-static void get_cmdline(char *buf, int size)
+static void prep_cmdline(void *chosen)
{
- void *devp;
- int len = strlen(builtin_cmdline);
+ if (cmdline[0] == '\0')
+ getprop(chosen, "bootargs", cmdline, COMMAND_LINE_SIZE-1);
- buf[0] = '\0';
+ printf("\n\rLinux/PowerPC load: %s", cmdline);
+ /* If possible, edit the command line */
+ if (console_ops.edit_cmdline)
+ console_ops.edit_cmdline(cmdline, COMMAND_LINE_SIZE);
+ printf("\n\r");
- if (len > 0) { /* builtin_cmdline overrides dt's /chosen/bootargs */
- len = min(len, size-1);
- strncpy(buf, builtin_cmdline, len);
- buf[len] = '\0';
- }
- else if ((devp = finddevice("/chosen")))
- getprop(devp, "bootargs", buf, size);
-}
-
-static void set_cmdline(char *buf)
-{
- void *devp;
-
- if ((devp = finddevice("/chosen")))
- setprop(devp, "bootargs", buf, strlen(buf) + 1);
+ /* Put the command line back into the devtree for the kernel */
+ setprop_str(chosen, "bootargs", cmdline);
}
struct platform_ops platform_ops;
struct console_ops console_ops;
struct loader_info loader_info;
-void start(void *sp)
+void start(void)
{
struct addr_range vmlinux, initrd;
kernel_entry_t kentry;
- char cmdline[COMMAND_LINE_SIZE];
unsigned long ft_addr = 0;
+ void *chosen;
+
+ /* Do this first, because malloc() could clobber the loader's
+ * command line. Only use the loader command line if a
+ * built-in command line wasn't set by an external tool */
+ if ((loader_info.cmdline_len > 0) && (cmdline[0] == '\0'))
+ memmove(cmdline, loader_info.cmdline,
+ min(loader_info.cmdline_len, COMMAND_LINE_SIZE-1));
if (console_ops.open && (console_ops.open() < 0))
exit();
platform_ops.fixups();
printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r",
- _start, sp);
+ _start, get_sp());
- vmlinux = prep_kernel();
- initrd = prep_initrd(vmlinux, loader_info.initrd_addr,
- loader_info.initrd_size);
+ /* Ensure that the device tree has a /chosen node */
+ chosen = finddevice("/chosen");
+ if (!chosen)
+ chosen = create_node(NULL, "chosen");
- /* If cmdline came from zimage wrapper or if we can edit the one
- * in the dt, print it out and edit it, if possible.
- */
- if ((strlen(builtin_cmdline) > 0) || console_ops.edit_cmdline) {
- get_cmdline(cmdline, COMMAND_LINE_SIZE);
- printf("\n\rLinux/PowerPC load: %s", cmdline);
- if (console_ops.edit_cmdline)
- console_ops.edit_cmdline(cmdline, COMMAND_LINE_SIZE);
- printf("\n\r");
- set_cmdline(cmdline);
- }
+ vmlinux = prep_kernel();
+ initrd = prep_initrd(vmlinux, chosen,
+ loader_info.initrd_addr, loader_info.initrd_size);
+ prep_cmdline(chosen);
printf("Finalizing device tree...");
if (dt_ops.finalize)
kentry((unsigned long)initrd.addr, initrd.size,
loader_info.promptr);
- /* console closed so printf below may not work */
- printf("Error: Linux kernel returned to zImage boot wrapper!\n\r");
- exit();
+ /* console closed so printf in fatal below may not work */
+ fatal("Error: Linux kernel returned to zImage boot wrapper!\n\r");
}
projects / powerpc.git / blobdiff