lib_ppc/bootm.c - u-boot - Git at Google

 /*
  * (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 */
 	}
 }
	/*
	* (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 (76810241024)
	#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 */
	}
	}