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-rw-r--r--arch/powerpc/lib/bootm.c367
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diff --git a/arch/powerpc/lib/bootm.c b/arch/powerpc/lib/bootm.c
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+/*
+ * (C) Copyright 2008 Semihalf
+ *
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <image.h>
+#include <malloc.h>
+#include <u-boot/zlib.h>
+#include <bzlib.h>
+#include <environment.h>
+#include <asm/byteorder.h>
+
+#if defined(CONFIG_OF_LIBFDT)
+#include <fdt.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+
+#endif
+
+#ifdef CONFIG_SYS_INIT_RAM_LOCK
+#include <asm/cache.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+extern ulong get_effective_memsize(void);
+static ulong get_sp (void);
+static void set_clocks_in_mhz (bd_t *kbd);
+
+#ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
+#define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
+#endif
+
+static void boot_jump_linux(bootm_headers_t *images)
+{
+ void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
+ ulong r7, ulong r8, ulong r9);
+#ifdef CONFIG_OF_LIBFDT
+ char *of_flat_tree = images->ft_addr;
+#endif
+
+ kernel = (void (*)(bd_t *, ulong, ulong, ulong,
+ ulong, ulong, ulong))images->ep;
+ debug ("## Transferring control to Linux (at address %08lx) ...\n",
+ (ulong)kernel);
+
+ show_boot_progress (15);
+
+#if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
+ unlock_ram_in_cache();
+#endif
+
+#if defined(CONFIG_OF_LIBFDT)
+ if (of_flat_tree) { /* device tree; boot new style */
+ /*
+ * Linux Kernel Parameters (passing device tree):
+ * r3: pointer to the fdt
+ * r4: 0
+ * r5: 0
+ * r6: epapr magic
+ * r7: size of IMA in bytes
+ * r8: 0
+ * r9: 0
+ */
+#if defined(CONFIG_85xx) || defined(CONFIG_440)
+ #define EPAPR_MAGIC (0x45504150)
+#else
+ #define EPAPR_MAGIC (0x65504150)
+#endif
+
+ debug (" Booting using OF flat tree...\n");
+ WATCHDOG_RESET ();
+ (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
+ CONFIG_SYS_BOOTMAPSZ, 0, 0);
+ /* does not return */
+ } else
+#endif
+ {
+ /*
+ * Linux Kernel Parameters (passing board info data):
+ * r3: ptr to board info data
+ * r4: initrd_start or 0 if no initrd
+ * r5: initrd_end - unused if r4 is 0
+ * r6: Start of command line string
+ * r7: End of command line string
+ * r8: 0
+ * r9: 0
+ */
+ ulong cmd_start = images->cmdline_start;
+ ulong cmd_end = images->cmdline_end;
+ ulong initrd_start = images->initrd_start;
+ ulong initrd_end = images->initrd_end;
+ bd_t *kbd = images->kbd;
+
+ debug (" Booting using board info...\n");
+ WATCHDOG_RESET ();
+ (*kernel) (kbd, initrd_start, initrd_end,
+ cmd_start, cmd_end, 0, 0);
+ /* does not return */
+ }
+ return ;
+}
+
+void arch_lmb_reserve(struct lmb *lmb)
+{
+ phys_size_t bootm_size;
+ ulong size, sp, bootmap_base;
+
+ bootmap_base = getenv_bootm_low();
+ bootm_size = getenv_bootm_size();
+
+#ifdef DEBUG
+ if (((u64)bootmap_base + bootm_size) >
+ (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
+ puts("WARNING: bootm_low + bootm_size exceed total memory\n");
+ if ((bootmap_base + bootm_size) > get_effective_memsize())
+ puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
+#endif
+
+ size = min(bootm_size, get_effective_memsize());
+ size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
+
+ if (size < bootm_size) {
+ ulong base = bootmap_base + size;
+ printf("WARNING: adjusting available memory to %lx\n", size);
+ lmb_reserve(lmb, base, bootm_size - size);
+ }
+
+ /*
+ * Booting a (Linux) kernel image
+ *
+ * Allocate space for command line and board info - the
+ * address should be as high as possible within the reach of
+ * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
+ * memory, which means far enough below the current stack
+ * pointer.
+ */
+ sp = get_sp();
+ debug ("## Current stack ends at 0x%08lx\n", sp);
+
+ /* adjust sp by 1K to be safe */
+ sp -= 1024;
+ lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
+
+ return ;
+}
+
+static void boot_prep_linux(void)
+{
+#ifdef CONFIG_MP
+ /* if we are MP make sure to flush the dcache() to any changes are made
+ * visibile to all other cores */
+ flush_dcache();
+#endif
+ return ;
+}
+
+static int boot_cmdline_linux(bootm_headers_t *images)
+{
+ ulong bootmap_base = getenv_bootm_low();
+ ulong of_size = images->ft_len;
+ struct lmb *lmb = &images->lmb;
+ ulong *cmd_start = &images->cmdline_start;
+ ulong *cmd_end = &images->cmdline_end;
+
+ int ret = 0;
+
+ if (!of_size) {
+ /* allocate space and init command line */
+ ret = boot_get_cmdline (lmb, cmd_start, cmd_end, bootmap_base);
+ if (ret) {
+ puts("ERROR with allocation of cmdline\n");
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static int boot_bd_t_linux(bootm_headers_t *images)
+{
+ ulong bootmap_base = getenv_bootm_low();
+ ulong of_size = images->ft_len;
+ struct lmb *lmb = &images->lmb;
+ bd_t **kbd = &images->kbd;
+
+ int ret = 0;
+
+ if (!of_size) {
+ /* allocate space for kernel copy of board info */
+ ret = boot_get_kbd (lmb, kbd, bootmap_base);
+ if (ret) {
+ puts("ERROR with allocation of kernel bd\n");
+ return ret;
+ }
+ set_clocks_in_mhz(*kbd);
+ }
+
+ return ret;
+}
+
+static int boot_body_linux(bootm_headers_t *images)
+{
+ ulong rd_len;
+ struct lmb *lmb = &images->lmb;
+ ulong *initrd_start = &images->initrd_start;
+ ulong *initrd_end = &images->initrd_end;
+#if defined(CONFIG_OF_LIBFDT)
+ ulong bootmap_base = getenv_bootm_low();
+ ulong of_size = images->ft_len;
+ char **of_flat_tree = &images->ft_addr;
+#endif
+
+ int ret;
+
+ /* allocate space and init command line */
+ ret = boot_cmdline_linux(images);
+ if (ret)
+ return ret;
+
+ /* allocate space for kernel copy of board info */
+ ret = boot_bd_t_linux(images);
+ if (ret)
+ return ret;
+
+ rd_len = images->rd_end - images->rd_start;
+ ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end);
+ if (ret)
+ return ret;
+
+#if defined(CONFIG_OF_LIBFDT)
+ ret = boot_relocate_fdt(lmb, bootmap_base, of_flat_tree, &of_size);
+ if (ret)
+ return ret;
+
+ /*
+ * Add the chosen node if it doesn't exist, add the env and bd_t
+ * if the user wants it (the logic is in the subroutines).
+ */
+ if (of_size) {
+ if (fdt_chosen(*of_flat_tree, 1) < 0) {
+ puts ("ERROR: ");
+ puts ("/chosen node create failed");
+ puts (" - must RESET the board to recover.\n");
+ return -1;
+ }
+#ifdef CONFIG_OF_BOARD_SETUP
+ /* Call the board-specific fixup routine */
+ ft_board_setup(*of_flat_tree, gd->bd);
+#endif
+
+ /* Delete the old LMB reservation */
+ lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree,
+ (phys_size_t)fdt_totalsize(*of_flat_tree));
+
+ ret = fdt_resize(*of_flat_tree);
+ if (ret < 0)
+ return ret;
+ of_size = ret;
+
+ if (*initrd_start && *initrd_end)
+ of_size += FDT_RAMDISK_OVERHEAD;
+ /* Create a new LMB reservation */
+ lmb_reserve(lmb, (ulong)*of_flat_tree, of_size);
+
+ /* fixup the initrd now that we know where it should be */
+ if (*initrd_start && *initrd_end)
+ fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
+ }
+#endif /* CONFIG_OF_LIBFDT */
+ return 0;
+}
+
+__attribute__((noinline))
+int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
+{
+ int ret;
+
+ if (flag & BOOTM_STATE_OS_CMDLINE) {
+ boot_cmdline_linux(images);
+ return 0;
+ }
+
+ if (flag & BOOTM_STATE_OS_BD_T) {
+ boot_bd_t_linux(images);
+ return 0;
+ }
+
+ if (flag & BOOTM_STATE_OS_PREP) {
+ boot_prep_linux();
+ return 0;
+ }
+
+ if (flag & BOOTM_STATE_OS_GO) {
+ boot_jump_linux(images);
+ return 0;
+ }
+
+ boot_prep_linux();
+ ret = boot_body_linux(images);
+ if (ret)
+ return ret;
+ boot_jump_linux(images);
+
+ return 0;
+}
+
+static ulong get_sp (void)
+{
+ ulong sp;
+
+ asm( "mr %0,1": "=r"(sp) : );
+ return sp;
+}
+
+static void set_clocks_in_mhz (bd_t *kbd)
+{
+ char *s;
+
+ if ((s = getenv ("clocks_in_mhz")) != NULL) {
+ /* convert all clock information to MHz */
+ kbd->bi_intfreq /= 1000000L;
+ kbd->bi_busfreq /= 1000000L;
+#if defined(CONFIG_MPC8220)
+ kbd->bi_inpfreq /= 1000000L;
+ kbd->bi_pcifreq /= 1000000L;
+ kbd->bi_pevfreq /= 1000000L;
+ kbd->bi_flbfreq /= 1000000L;
+ kbd->bi_vcofreq /= 1000000L;
+#endif
+#if defined(CONFIG_CPM2)
+ kbd->bi_cpmfreq /= 1000000L;
+ kbd->bi_brgfreq /= 1000000L;
+ kbd->bi_sccfreq /= 1000000L;
+ kbd->bi_vco /= 1000000L;
+#endif
+#if defined(CONFIG_MPC5xxx)
+ kbd->bi_ipbfreq /= 1000000L;
+ kbd->bi_pcifreq /= 1000000L;
+#endif /* CONFIG_MPC5xxx */
+ }
+}
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