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arm: Add Prep subcommand support to bootm

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Adds prep subcommand to bootm implementation of ARM. When bootm is called
with the subcommand prep the function stops right after ATAGS creation and
before announce_and_cleanup.

This is used in command "cmd_spl export"

Signed-off-by: Simon Schwarz <simonschwarzcor@gmail.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Tested-by: Stefano Babic <sbabic@denx.de>
Signed-off-by: Tom Rini <trini@ti.com>
master
Simon Schwarz 12 years ago committed by Albert ARIBAUD
parent 84c21fb16f
commit 0a672d494d
2 changed files with 206 additions and 169 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 26
      arch/arm/include/asm/bootm.h
  2. 349
      arch/arm/lib/bootm.c

26
arch/arm/include/asm/bootm.h
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@ -0,0 +1,26 @@
/* Copyright (C) 2011
* Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
*
* 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
*
*/
#ifndef ARM_BOOTM_H
#define ARM_BOOTM_H
#ifdef CONFIG_USB_DEVICE
extern void udc_disconnect(void);
#endif
#endif

349
arch/arm/lib/bootm.c
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@ -1,4 +1,8 @@
/*
/* Copyright (C) 2011
* Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
* - Added prep subcommand support
* - Reorganized source - modeled after powerpc version
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
@ -29,35 +33,26 @@
#include <fdt.h>
#include <libfdt.h>
#include <fdt_support.h>
#include <asm/bootm.h>
DECLARE_GLOBAL_DATA_PTR;
#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
defined (CONFIG_CMDLINE_TAG) || \
defined (CONFIG_INITRD_TAG) || \
defined (CONFIG_SERIAL_TAG) || \
defined (CONFIG_REVISION_TAG)
static void setup_start_tag (bd_t *bd);
# ifdef CONFIG_SETUP_MEMORY_TAGS
static void setup_memory_tags (bd_t *bd);
# endif
static void setup_commandline_tag (bd_t *bd, char *commandline);
# ifdef CONFIG_INITRD_TAG
static void setup_initrd_tag (bd_t *bd, ulong initrd_start,
ulong initrd_end);
# endif
static void setup_end_tag (bd_t *bd);
#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
defined(CONFIG_CMDLINE_TAG) || \
defined(CONFIG_INITRD_TAG) || \
defined(CONFIG_SERIAL_TAG) || \
defined(CONFIG_REVISION_TAG)
static struct tag *params;
#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
static ulong get_sp(void);
#if defined(CONFIG_OF_LIBFDT)
static int bootm_linux_fdt(int machid, bootm_headers_t *images);
#endif
static ulong get_sp(void)
{
ulong ret;
asm("mov %0, sp" : "=r"(ret) : );
return ret;
}
void arch_lmb_reserve(struct lmb *lmb)
{
ulong sp;
@ -80,89 +75,7 @@ void arch_lmb_reserve(struct lmb *lmb)
gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
}
static void announce_and_cleanup(void)
{
printf("\nStarting kernel ...\n\n");
bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
#ifdef CONFIG_BOOTSTAGE_REPORT
bootstage_report();
#endif
#ifdef CONFIG_USB_DEVICE
{
extern void udc_disconnect(void);
udc_disconnect();
}
#endif
cleanup_before_linux();
}
int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
{
bd_t *bd = gd->bd;
char *s;
int machid = bd->bi_arch_number;
void (*kernel_entry)(int zero, int arch, uint params);
#ifdef CONFIG_CMDLINE_TAG
char *commandline = getenv ("bootargs");
#endif
if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
return 1;
s = getenv ("machid");
if (s) {
machid = simple_strtoul (s, NULL, 16);
printf ("Using machid 0x%x from environment\n", machid);
}
bootstage_mark(BOOTSTAGE_ID_RUN_OS);
#ifdef CONFIG_OF_LIBFDT
if (images->ft_len)
return bootm_linux_fdt(machid, images);
#endif
kernel_entry = (void (*)(int, int, uint))images->ep;
debug ("## Transferring control to Linux (at address %08lx) ...\n",
(ulong) kernel_entry);
#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
defined (CONFIG_CMDLINE_TAG) || \
defined (CONFIG_INITRD_TAG) || \
defined (CONFIG_SERIAL_TAG) || \
defined (CONFIG_REVISION_TAG)
setup_start_tag (bd);
#ifdef CONFIG_SERIAL_TAG
setup_serial_tag (&params);
#endif
#ifdef CONFIG_REVISION_TAG
setup_revision_tag (&params);
#endif
#ifdef CONFIG_SETUP_MEMORY_TAGS
setup_memory_tags (bd);
#endif
#ifdef CONFIG_CMDLINE_TAG
setup_commandline_tag (bd, commandline);
#endif
#ifdef CONFIG_INITRD_TAG
if (images->rd_start && images->rd_end)
setup_initrd_tag (bd, images->rd_start, images->rd_end);
#endif
setup_end_tag(bd);
#endif
announce_and_cleanup();
kernel_entry(0, machid, bd->bi_boot_params);
/* does not return */
return 1;
}
#if defined(CONFIG_OF_LIBFDT)
static int fixup_memory_node(void *blob)
{
bd_t *bd = gd->bd;
@ -177,60 +90,30 @@ static int fixup_memory_node(void *blob)
return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
}
#endif
static int bootm_linux_fdt(int machid, bootm_headers_t *images)
static void announce_and_cleanup(void)
{
ulong rd_len;
void (*kernel_entry)(int zero, int dt_machid, void *dtblob);
ulong of_size = images->ft_len;
char **of_flat_tree = &images->ft_addr;
ulong *initrd_start = &images->initrd_start;
ulong *initrd_end = &images->initrd_end;
struct lmb *lmb = &images->lmb;
int ret;
kernel_entry = (void (*)(int, int, void *))images->ep;
boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
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;
ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
if (ret)
return ret;
debug("## Transferring control to Linux (at address %08lx) ...\n",
(ulong) kernel_entry);
fdt_chosen(*of_flat_tree, 1);
fixup_memory_node(*of_flat_tree);
fdt_fixup_ethernet(*of_flat_tree);
fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
announce_and_cleanup();
kernel_entry(0, machid, *of_flat_tree);
/* does not return */
printf("\nStarting kernel ...\n\n");
bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
#ifdef CONFIG_BOOTSTAGE_REPORT
bootstage_report();
#endif
return 1;
}
#ifdef CONFIG_USB_DEVICE
udc_disconnect();
#endif
cleanup_before_linux();
}
#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
defined (CONFIG_CMDLINE_TAG) || \
defined (CONFIG_INITRD_TAG) || \
defined (CONFIG_SERIAL_TAG) || \
defined (CONFIG_REVISION_TAG)
#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
defined(CONFIG_CMDLINE_TAG) || \
defined(CONFIG_INITRD_TAG) || \
defined(CONFIG_SERIAL_TAG) || \
defined(CONFIG_REVISION_TAG)
static void setup_start_tag (bd_t *bd)
{
params = (struct tag *) bd->bi_boot_params;
params = (struct tag *)bd->bi_boot_params;
params->hdr.tag = ATAG_CORE;
params->hdr.size = tag_size (tag_core);
@ -241,10 +124,10 @@ static void setup_start_tag (bd_t *bd)
params = tag_next (params);
}
#endif
#ifdef CONFIG_SETUP_MEMORY_TAGS
static void setup_memory_tags (bd_t *bd)
static void setup_memory_tags(bd_t *bd)
{
int i;
@ -258,10 +141,10 @@ static void setup_memory_tags (bd_t *bd)
params = tag_next (params);
}
}
#endif /* CONFIG_SETUP_MEMORY_TAGS */
#endif
static void setup_commandline_tag (bd_t *bd, char *commandline)
#ifdef CONFIG_CMDLINE_TAG
static void setup_commandline_tag(bd_t *bd, char *commandline)
{
char *p;
@ -285,10 +168,10 @@ static void setup_commandline_tag (bd_t *bd, char *commandline)
params = tag_next (params);
}
#endif
#ifdef CONFIG_INITRD_TAG
static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
{
/* an ATAG_INITRD node tells the kernel where the compressed
* ramdisk can be found. ATAG_RDIMG is a better name, actually.
@ -301,10 +184,10 @@ static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
params = tag_next (params);
}
#endif /* CONFIG_INITRD_TAG */
#endif
#ifdef CONFIG_SERIAL_TAG
void setup_serial_tag (struct tag **tmp)
void setup_serial_tag(struct tag **tmp)
{
struct tag *params = *tmp;
struct tag_serialnr serialnr;
@ -332,19 +215,147 @@ void setup_revision_tag(struct tag **in_params)
params->u.revision.rev = rev;
params = tag_next (params);
}
#endif /* CONFIG_REVISION_TAG */
#endif
static void setup_end_tag (bd_t *bd)
#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
defined(CONFIG_CMDLINE_TAG) || \
defined(CONFIG_INITRD_TAG) || \
defined(CONFIG_SERIAL_TAG) || \
defined(CONFIG_REVISION_TAG)
static void setup_end_tag(bd_t *bd)
{
params->hdr.tag = ATAG_NONE;
params->hdr.size = 0;
}
#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
#endif
static ulong get_sp(void)
#ifdef CONFIG_OF_LIBFDT
static int create_fdt(bootm_headers_t *images)
{
ulong ret;
ulong of_size = images->ft_len;
char **of_flat_tree = &images->ft_addr;
ulong *initrd_start = &images->initrd_start;
ulong *initrd_end = &images->initrd_end;
struct lmb *lmb = &images->lmb;
ulong rd_len;
int ret;
asm("mov %0, sp" : "=r"(ret) : );
return ret;
debug("using: FDT\n");
boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);
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;
ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
if (ret)
return ret;
fdt_chosen(*of_flat_tree, 1);
fixup_memory_node(*of_flat_tree);
fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1);
return 0;
}
#endif
/* Subcommand: PREP */
static void boot_prep_linux(bootm_headers_t *images)
{
#ifdef CONFIG_CMDLINE_TAG
char *commandline = getenv("bootargs");
#endif
#ifdef CONFIG_OF_LIBFDT
if (images->ft_len) {
debug("using: FDT\n");
if (create_fdt(images)) {
printf("FDT creation failed! hanging...");
hang();
}
} else
#endif
{
#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
defined(CONFIG_CMDLINE_TAG) || \
defined(CONFIG_INITRD_TAG) || \
defined(CONFIG_SERIAL_TAG) || \
defined(CONFIG_REVISION_TAG)
debug("using: ATAGS\n");
setup_start_tag(gd->bd);
#ifdef CONFIG_SERIAL_TAG
setup_serial_tag(&params);
#endif
#ifdef CONFIG_CMDLINE_TAG
setup_commandline_tag(gd->bd, commandline);
#endif
#ifdef CONFIG_REVISION_TAG
setup_revision_tag(&params);
#endif
#ifdef CONFIG_SETUP_MEMORY_TAGS
setup_memory_tags(gd->bd);
#endif
#ifdef CONFIG_INITRD_TAG
if (images->rd_start && images->rd_end)
setup_initrd_tag(gd->bd, images->rd_start,
images->rd_end);
#endif
setup_end_tag(gd->bd);
#else /* all tags */
printf("FDT and ATAGS support not compiled in - hanging\n");
hang();
#endif /* all tags */
}
}
/* Subcommand: GO */
static void boot_jump_linux(bootm_headers_t *images)
{
unsigned long machid = gd->bd->bi_arch_number;
char *s;
void (*kernel_entry)(int zero, int arch, uint params);
kernel_entry = (void (*)(int, int, uint))images->ep;
s = getenv("machid");
if (s) {
strict_strtoul(s, 16, &machid);
printf("Using machid 0x%lx from environment\n", machid);
}
debug("## Transferring control to Linux (at address %08lx)" \
"...\n", (ulong) kernel_entry);
bootstage_mark(BOOTSTAGE_ID_RUN_OS);
announce_and_cleanup();
kernel_entry(0, machid, gd->bd->bi_boot_params);
}
/* Main Entry point for arm bootm implementation
*
* Modeled after the powerpc implementation
* DIFFERENCE: Instead of calling prep and go at the end
* they are called if subcommand is equal 0.
*/
int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
{
/* No need for those on ARM */
if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
return -1;
if (flag & BOOTM_STATE_OS_PREP) {
boot_prep_linux(images);
return 0;
}
if (flag & BOOTM_STATE_OS_GO) {
boot_jump_linux(images);
return 0;
}
boot_prep_linux(images);
boot_jump_linux(images);
return 0;
}

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