diff options
Diffstat (limited to 'arch/ppc/boot/simple/misc-embedded.c')
| -rw-r--r-- | arch/ppc/boot/simple/misc-embedded.c | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/arch/ppc/boot/simple/misc-embedded.c b/arch/ppc/boot/simple/misc-embedded.c deleted file mode 100644 index d5a00eb..0000000 --- a/arch/ppc/boot/simple/misc-embedded.c +++ /dev/null @@ -1,276 +0,0 @@ -/* - * Originally adapted by Gary Thomas. Much additional work by - * Cort Dougan <cort@fsmlabs.com>. On top of that still more work by - * Dan Malek <dmalek@jlc.net>. - * - * Currently maintained by: Tom Rini <trini@kernel.crashing.org> - */ - -#include <linux/types.h> -#include <linux/string.h> -#include <asm/bootinfo.h> -#include <asm/mmu.h> -#include <asm/page.h> -#include <asm/residual.h> -#if defined(CONFIG_4xx) -#include <asm/ibm4xx.h> -#elif defined(CONFIG_8xx) -#include <asm/mpc8xx.h> -#elif defined(CONFIG_8260) -#include <asm/mpc8260.h> -#endif - -#include "nonstdio.h" - -/* The linker tells us where the image is. */ -extern char __image_begin, __image_end; -extern char __ramdisk_begin, __ramdisk_end; -extern char _end[]; - -/* Because of the limited amount of memory on embedded, it presents - * loading problems. The biggest is that we load this boot program - * into a relatively low memory address, and the Linux kernel Bss often - * extends into this space when it get loaded. When the kernel starts - * and zeros the BSS space, it also writes over the information we - * save here and pass to the kernel (usually board info). - * On these boards, we grab some known memory holes to hold this information. - */ -char cmd_buf[256]; -char *cmd_line = cmd_buf; -char *avail_ram; -char *end_avail; -char *zimage_start; - -/* This is for 4xx treeboot. It provides a place for the bootrom - * give us a pointer to a rom environment command line. - */ -char *bootrom_cmdline = ""; - -/* This is the default cmdline that will be given to the user at boot time.. - * If none was specified at compile time, we'll give it one that should work. - * -- Tom */ -#ifdef CONFIG_CMDLINE_BOOL -char compiled_string[] = CONFIG_CMDLINE; -#endif -char ramroot_string[] = "root=/dev/ram"; -char netroot_string[] = "root=/dev/nfs rw ip=on"; - -/* Serial port to use. */ -unsigned long com_port; - -/* We need to make sure that this is before the images to ensure - * that it's in a mapped location. - Tom */ -bd_t hold_resid_buf __attribute__ ((__section__ (".data.boot"))); -bd_t *hold_residual = &hold_resid_buf; - -extern unsigned long serial_init(int chan, bd_t *bp); -extern void serial_close(unsigned long com_port); -extern unsigned long start; -extern void flush_instruction_cache(void); -extern void gunzip(void *, int, unsigned char *, int *); -extern void embed_config(bd_t **bp); - -/* Weak function for boards which don't need to build the - * board info struct because they are using PPCBoot/U-Boot. - */ -void __attribute__ ((weak)) -embed_config(bd_t **bdp) -{ -} - -unsigned long -load_kernel(unsigned long load_addr, int num_words, unsigned long cksum, bd_t *bp) -{ - char *cp, ch; - int timer = 0, zimage_size; - unsigned long initrd_size; - - /* First, capture the embedded board information. Then - * initialize the serial console port. - */ - embed_config(&bp); -#if defined(CONFIG_SERIAL_CPM_CONSOLE) || \ - defined(CONFIG_SERIAL_8250_CONSOLE) || \ - defined(CONFIG_SERIAL_UARTLITE_CONSOLE) - com_port = serial_init(0, bp); -#endif - - /* Grab some space for the command line and board info. Since - * we no longer use the ELF header, but it was loaded, grab - * that space. - */ -#ifdef CONFIG_MBX - /* Because of the way the MBX loads the ELF image, we can't - * tell where we started. We read a magic variable from the NVRAM - * that gives us the intermediate buffer load address. - */ - load_addr = *(uint *)0xfa000020; - load_addr += 0x10000; /* Skip ELF header */ -#endif - /* copy board data */ - if (bp) - memcpy(hold_residual,bp,sizeof(bd_t)); - - /* Set end of memory available to us. It is always the highest - * memory address provided by the board information. - */ - end_avail = (char *)(bp->bi_memsize); - - puts("\nloaded at: "); puthex(load_addr); - puts(" "); puthex((unsigned long)(load_addr + (4*num_words))); puts("\n"); - if ( (unsigned long)load_addr != (unsigned long)&start ) { - puts("relocated to: "); puthex((unsigned long)&start); - puts(" "); - puthex((unsigned long)((unsigned long)&start + (4*num_words))); - puts("\n"); - } - - if ( bp ) { - puts("board data at: "); puthex((unsigned long)bp); - puts(" "); - puthex((unsigned long)((unsigned long)bp + sizeof(bd_t))); - puts("\nrelocated to: "); - puthex((unsigned long)hold_residual); - puts(" "); - puthex((unsigned long)((unsigned long)hold_residual + sizeof(bd_t))); - puts("\n"); - } - - /* - * We link ourself to an arbitrary low address. When we run, we - * relocate ourself to that address. __image_being points to - * the part of the image where the zImage is. -- Tom - */ - zimage_start = (char *)(unsigned long)(&__image_begin); - zimage_size = (unsigned long)(&__image_end) - - (unsigned long)(&__image_begin); - - initrd_size = (unsigned long)(&__ramdisk_end) - - (unsigned long)(&__ramdisk_begin); - - /* - * The zImage and initrd will be between start and _end, so they've - * already been moved once. We're good to go now. -- Tom - */ - puts("zimage at: "); puthex((unsigned long)zimage_start); - puts(" "); puthex((unsigned long)(zimage_size+zimage_start)); - puts("\n"); - - if ( initrd_size ) { - puts("initrd at: "); - puthex((unsigned long)(&__ramdisk_begin)); - puts(" "); puthex((unsigned long)(&__ramdisk_end));puts("\n"); - } - - /* - * setup avail_ram - this is the first part of ram usable - * by the uncompress code. Anything after this program in RAM - * is now fair game. -- Tom - */ - avail_ram = (char *)PAGE_ALIGN((unsigned long)_end); - - puts("avail ram: "); puthex((unsigned long)avail_ram); puts(" "); - puthex((unsigned long)end_avail); puts("\n"); - puts("\nLinux/PPC load: "); - cp = cmd_line; - /* This is where we try and pick the right command line for booting. - * If we were given one at compile time, use it. It Is Right. - * If we weren't, see if we have a ramdisk. If so, thats root. - * When in doubt, give them the netroot (root=/dev/nfs rw) -- Tom - */ -#ifdef CONFIG_CMDLINE_BOOL - memcpy (cmd_line, compiled_string, sizeof(compiled_string)); -#else - if ( initrd_size ) - memcpy (cmd_line, ramroot_string, sizeof(ramroot_string)); - else - memcpy (cmd_line, netroot_string, sizeof(netroot_string)); -#endif - while ( *cp ) - putc(*cp++); - while (timer++ < 5*1000) { - if (tstc()) { - while ((ch = getc()) != '\n' && ch != '\r') { - if (ch == '\b' || ch == '\177') { - if (cp != cmd_line) { - cp--; - puts("\b \b"); - } - } else if (ch == '\030' /* ^x */ - || ch == '\025') { /* ^u */ - while (cp != cmd_line) { - cp--; - puts("\b \b"); - } - } else { - *cp++ = ch; - putc(ch); - } - } - break; /* Exit 'timer' loop */ - } - udelay(1000); /* 1 msec */ - } - *cp = 0; - puts("\nUncompressing Linux..."); - - gunzip(0, 0x400000, zimage_start, &zimage_size); - flush_instruction_cache(); - puts("done.\n"); - { - struct bi_record *rec; - unsigned long initrd_loc = 0; - unsigned long rec_loc = _ALIGN((unsigned long)(zimage_size) + - (1 << 20) - 1, (1 << 20)); - rec = (struct bi_record *)rec_loc; - - /* We need to make sure that the initrd and bi_recs do not - * overlap. */ - if ( initrd_size ) { - initrd_loc = (unsigned long)(&__ramdisk_begin); - /* If the bi_recs are in the middle of the current - * initrd, move the initrd to the next MB - * boundary. */ - if ((rec_loc > initrd_loc) && - ((initrd_loc + initrd_size) - > rec_loc)) { - initrd_loc = _ALIGN((unsigned long)(zimage_size) - + (2 << 20) - 1, (2 << 20)); - memmove((void *)initrd_loc, &__ramdisk_begin, - initrd_size); - puts("initrd moved: "); puthex(initrd_loc); - puts(" "); puthex(initrd_loc + initrd_size); - puts("\n"); - } - } - - rec->tag = BI_FIRST; - rec->size = sizeof(struct bi_record); - rec = (struct bi_record *)((unsigned long)rec + rec->size); - - rec->tag = BI_CMD_LINE; - memcpy( (char *)rec->data, cmd_line, strlen(cmd_line)+1); - rec->size = sizeof(struct bi_record) + strlen(cmd_line) + 1; - rec = (struct bi_record *)((unsigned long)rec + rec->size); - - if ( initrd_size ) { - rec->tag = BI_INITRD; - rec->data[0] = initrd_loc; - rec->data[1] = initrd_size; - rec->size = sizeof(struct bi_record) + 2 * - sizeof(unsigned long); - rec = (struct bi_record *)((unsigned long)rec + - rec->size); - } - - rec->tag = BI_LAST; - rec->size = sizeof(struct bi_record); - rec = (struct bi_record *)((unsigned long)rec + rec->size); - } - puts("Now booting the kernel\n"); -#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) - serial_close(com_port); -#endif - - return (unsigned long)hold_residual; -} |
