diff options
Diffstat (limited to 'arch/ppc/boot/simple/misc.c')
-rw-r--r-- | arch/ppc/boot/simple/misc.c | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/arch/ppc/boot/simple/misc.c b/arch/ppc/boot/simple/misc.c deleted file mode 100644 index c3d3305eb5ca..000000000000 --- a/arch/ppc/boot/simple/misc.c +++ /dev/null @@ -1,278 +0,0 @@ -/* - * Misc. bootloader code for many machines. This assumes you have are using - * a 6xx/7xx/74xx CPU in your machine. This assumes the chunk of memory - * below 8MB is free. Finally, it assumes you have a NS16550-style uart for - * your serial console. If a machine meets these requirements, it can quite - * likely use this code during boot. - * - * Author: Matt Porter <mporter@mvista.com> - * Derived from arch/ppc/boot/prep/misc.c - * - * 2001 (c) MontaVista, Software, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. - */ - -#include <linux/types.h> -#include <linux/string.h> - -#include <asm/page.h> -#include <asm/mmu.h> -#include <asm/bootinfo.h> -#ifdef CONFIG_4xx -#include <asm/ibm4xx.h> -#endif -#include <asm/reg.h> - -#include "nonstdio.h" - -/* Default cmdline */ -#ifdef CONFIG_CMDLINE -#define CMDLINE CONFIG_CMDLINE -#else -#define CMDLINE "" -#endif - -/* Keyboard (and VGA console)? */ -#ifdef CONFIG_VGA_CONSOLE -#define HAS_KEYB 1 -#else -#define HAS_KEYB 0 -#endif - -/* Will / Can the user give input? - */ -#if (defined(CONFIG_SERIAL_8250_CONSOLE) \ - || defined(CONFIG_VGA_CONSOLE) \ - || defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \ - || defined(CONFIG_SERIAL_MPSC_CONSOLE)) -#define INTERACTIVE_CONSOLE 1 -#endif - -char *avail_ram; -char *end_avail; -char *zimage_start; -char cmd_preset[] = CMDLINE; -char cmd_buf[256]; -char *cmd_line = cmd_buf; -int keyb_present = HAS_KEYB; -int zimage_size; - -unsigned long com_port; -unsigned long initrd_size = 0; - -/* The linker tells us various locations in the image */ -extern char __image_begin, __image_end; -extern char __ramdisk_begin, __ramdisk_end; -extern char _end[]; -/* Original location */ -extern unsigned long start; - -extern int CRT_tstc(void); -extern unsigned long serial_init(int chan, void *ignored); -extern void serial_close(unsigned long com_port); -extern void gunzip(void *, int, unsigned char *, int *); -extern void serial_fixups(void); - -/* Allow get_mem_size to be hooked into. This is the default. */ -unsigned long __attribute__ ((weak)) -get_mem_size(void) -{ - return 0; -} - -#if defined(CONFIG_40x) -#define PPC4xx_EMAC0_MR0 EMAC0_BASE -#endif - -#if defined(CONFIG_44x) && defined(PPC44x_EMAC0_MR0) -#define PPC4xx_EMAC0_MR0 PPC44x_EMAC0_MR0 -#endif - -struct bi_record * -decompress_kernel(unsigned long load_addr, int num_words, unsigned long cksum) -{ -#ifdef INTERACTIVE_CONSOLE - int timer = 0; - char ch; -#endif - char *cp; - struct bi_record *rec; - unsigned long initrd_loc = 0, TotalMemory = 0; - -#if defined(CONFIG_SERIAL_8250_CONSOLE) || defined(CONFIG_SERIAL_MPSC_CONSOLE) - com_port = serial_init(0, NULL); -#endif - -#if defined(PPC4xx_EMAC0_MR0) - /* Reset MAL */ - mtdcr(DCRN_MALCR(DCRN_MAL_BASE), MALCR_MMSR); - /* Wait for reset */ - while (mfdcr(DCRN_MALCR(DCRN_MAL_BASE)) & MALCR_MMSR) {}; - /* Reset EMAC */ - *(volatile unsigned long *)PPC4xx_EMAC0_MR0 = 0x20000000; - __asm__ __volatile__("eieio"); -#endif - - /* - * Call get_mem_size(), which is memory controller dependent, - * and we must have the correct file linked in here. - */ - TotalMemory = get_mem_size(); - - /* assume the chunk below 8M is free */ - end_avail = (char *)0x00800000; - - /* - * Reveal where we were loaded at and where we - * were relocated to. - */ - puts("loaded 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"); - } - - /* - * We link ourself to 0x00800000. When we run, we relocate - * ourselves there. So we just need __image_begin for the - * start. -- 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 - */ - avail_ram = (char *)PAGE_ALIGN((unsigned long)_end); - 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"); - } - -#ifndef CONFIG_40x /* don't overwrite the 40x image located at 0x00400000! */ - avail_ram = (char *)0x00400000; -#endif - end_avail = (char *)0x00800000; - puts("avail ram: "); puthex((unsigned long)avail_ram); puts(" "); - puthex((unsigned long)end_avail); puts("\n"); - - if (keyb_present) - CRT_tstc(); /* Forces keyboard to be initialized */ - - /* Display standard Linux/PPC boot prompt for kernel args */ - puts("\nLinux/PPC load: "); - cp = cmd_line; - memcpy (cmd_line, cmd_preset, sizeof(cmd_preset)); - while ( *cp ) putc(*cp++); - -#ifdef INTERACTIVE_CONSOLE - /* - * If they have a console, allow them to edit the command line. - * Otherwise, don't bother wasting the five seconds. - */ - while (timer++ < 5*1000) { - if (tstc()) { - while ((ch = getc()) != '\n' && ch != '\r') { - /* Test for backspace/delete */ - if (ch == '\b' || ch == '\177') { - if (cp != cmd_line) { - cp--; - puts("\b \b"); - } - /* Test for ^x/^u (and wipe the line) */ - } else if (ch == '\030' || ch == '\025') { - while (cp != cmd_line) { - cp--; - puts("\b \b"); - } - } else { - *cp++ = ch; - putc(ch); - } - } - break; /* Exit 'timer' loop */ - } - udelay(1000); /* 1 msec */ - } - *cp = 0; -#endif - puts("\n"); - - puts("Uncompressing Linux..."); - gunzip(NULL, 0x400000, zimage_start, &zimage_size); - puts("done.\n"); - - /* get the bi_rec address */ - rec = bootinfo_addr(zimage_size); - - /* We need to make sure that the initrd and bi_recs do not - * overlap. */ - if ( initrd_size ) { - unsigned long rec_loc = (unsigned long) rec; - 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"); - } - } - - bootinfo_init(rec); - if ( TotalMemory ) - bootinfo_append(BI_MEMSIZE, sizeof(int), (void*)&TotalMemory); - - bootinfo_append(BI_CMD_LINE, strlen(cmd_line)+1, (void*)cmd_line); - - /* add a bi_rec for the initrd if it exists */ - if (initrd_size) { - unsigned long initrd[2]; - - initrd[0] = initrd_loc; - initrd[1] = initrd_size; - - bootinfo_append(BI_INITRD, sizeof(initrd), &initrd); - } - puts("Now booting the kernel\n"); - serial_close(com_port); - - return rec; -} - -void __attribute__ ((weak)) -board_isa_init(void) -{ -} - -/* Allow decompress_kernel to be hooked into. This is the default. */ -void * __attribute__ ((weak)) -load_kernel(unsigned long load_addr, int num_words, unsigned long cksum, - void *ign1, void *ign2) -{ - board_isa_init(); - return decompress_kernel(load_addr, num_words, cksum); -} |