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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 <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 CFG_INIT_RAM_LOCK
#include <asm/cache.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
extern ulong get_effective_memsize(void);
static ulong get_sp (void);
static void set_clocks_in_mhz (bd_t *kbd);
#ifndef CFG_LINUX_LOWMEM_MAX_SIZE
#define CFG_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
#endif
__attribute__((noinline))
int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
{
ulong sp;
ulong initrd_start, initrd_end;
ulong rd_len;
ulong size;
phys_size_t bootm_size;
ulong cmd_start, cmd_end, bootmap_base;
bd_t *kbd;
void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
ulong r7, ulong r8, ulong r9);
int ret;
ulong of_size = images->ft_len;
struct lmb *lmb = &images->lmb;
#if defined(CONFIG_OF_LIBFDT)
char *of_flat_tree = images->ft_addr;
#endif
kernel = (void (*)(bd_t *, ulong, ulong, ulong,
ulong, ulong, ulong))images->ep;
bootmap_base = getenv_bootm_low();
bootm_size = getenv_bootm_size();
#ifdef DEBUG
if (((u64)bootmap_base + bootm_size) >
(CFG_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, CFG_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 CFG_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, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
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");
goto error;
}
/* 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");
goto error;
}
set_clocks_in_mhz(kbd);
}
rd_len = images->rd_end - images->rd_start;
#if defined(CONFIG_OF_LIBFDT)
ret = boot_relocate_fdt(lmb, bootmap_base, &of_flat_tree, &of_size);
if (ret)
goto error;
/*
* 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, 0) < 0) {
puts ("ERROR: ");
puts ("/chosen node create failed");
puts (" - must RESET the board to recover.\n");
goto error;
}
#ifdef CONFIG_OF_BOARD_SETUP
/* Call the board-specific fixup routine */
ft_board_setup(of_flat_tree, gd->bd);
#endif
}
/* Fixup the fdt memreserve now that we know how big it is */
if (of_flat_tree) {
/* 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)
goto error;
of_size = ret;
if ((of_flat_tree) && (initrd_start && initrd_end))
of_size += FDT_RAMDISK_OVERHEAD;
/* Create a new LMB reservation */
lmb_reserve(lmb, (ulong)of_flat_tree, of_size);
}
#endif /* CONFIG_OF_LIBFDT */
ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, &initrd_start, &initrd_end);
if (ret)
goto error;
#if defined(CONFIG_OF_LIBFDT)
/* fixup the initrd now that we know where it should be */
if ((of_flat_tree) && (initrd_start && initrd_end))
fdt_initrd(of_flat_tree, initrd_start, initrd_end, 1);
#endif
debug ("## Transferring control to Linux (at address %08lx) ...\n",
(ulong)kernel);
show_boot_progress (15);
#if defined(CFG_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");
(*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
CFG_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
*/
debug (" Booting using board info...\n");
(*kernel) (kbd, initrd_start, initrd_end,
cmd_start, cmd_end, 0, 0);
/* does not return */
}
return 1;
error:
return 1;
}
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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