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u-boot/arch/powerpc/lib/bootm.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

339 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008 Semihalf
*
* (C) Copyright 2000-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
#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>
#include <asm/mp.h>
#include <bootm.h>
#include <vxworks.h>
#if defined(CONFIG_OF_LIBFDT)
#include <linux/libfdt.h>
#include <fdt_support.h>
#endif
#ifdef CONFIG_SYS_INIT_RAM_LOCK
#include <asm/cache.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
static ulong get_sp (void);
extern void ft_fixup_num_cores(void *blob);
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);
bootstage_mark(BOOTSTAGE_ID_RUN_OS);
#ifdef CONFIG_BOOTSTAGE_FDT
bootstage_fdt_add_report();
#endif
#ifdef CONFIG_BOOTSTAGE_REPORT
bootstage_report();
#endif
#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
*/
debug (" Booting using OF flat tree...\n");
WATCHDOG_RESET ();
(*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
env_get_bootm_mapsize(), 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 = env_get_bootm_low();
bootm_size = env_get_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, (ulong)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 4K to be safe */
sp -= 4096;
lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
#ifdef CONFIG_MP
cpu_mp_lmb_reserve(lmb);
#endif
return ;
}
static void boot_prep_linux(bootm_headers_t *images)
{
#ifdef CONFIG_MP
/*
* if we are MP make sure to flush the device tree so any changes are
* made visibile to all other cores. In AMP boot scenarios the cores
* might not be HW cache coherent with each other.
*/
flush_cache((unsigned long)images->ft_addr, images->ft_len);
#endif
}
static int boot_cmdline_linux(bootm_headers_t *images)
{
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);
if (ret) {
puts("ERROR with allocation of cmdline\n");
return ret;
}
}
return ret;
}
static int boot_bd_t_linux(bootm_headers_t *images)
{
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);
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)
{
int ret;
/* allocate space for kernel copy of board info */
ret = boot_bd_t_linux(images);
if (ret)
return ret;
ret = image_setup_linux(images);
if (ret)
return ret;
return 0;
}
noinline
int do_bootm_linux(int flag, int argc, char * const 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(images);
return 0;
}
boot_prep_linux(images);
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;
s = env_get("clocks_in_mhz");
if (s) {
/* convert all clock information to MHz */
kbd->bi_intfreq /= 1000000L;
kbd->bi_busfreq /= 1000000L;
#if defined(CONFIG_CPM2)
kbd->bi_cpmfreq /= 1000000L;
kbd->bi_brgfreq /= 1000000L;
kbd->bi_sccfreq /= 1000000L;
kbd->bi_vco /= 1000000L;
#endif
}
}
#if defined(CONFIG_BOOTM_VXWORKS)
void boot_prep_vxworks(bootm_headers_t *images)
{
#if defined(CONFIG_OF_LIBFDT)
int off;
u64 base, size;
if (!images->ft_addr)
return;
base = (u64)gd->bd->bi_memstart;
size = (u64)gd->bd->bi_memsize;
off = fdt_path_offset(images->ft_addr, "/memory");
if (off < 0)
fdt_fixup_memory(images->ft_addr, base, size);
#if defined(CONFIG_MP)
#if defined(CONFIG_MPC85xx)
ft_fixup_cpu(images->ft_addr, base + size);
ft_fixup_num_cores(images->ft_addr);
#elif defined(CONFIG_MPC86xx)
off = fdt_add_mem_rsv(images->ft_addr,
determine_mp_bootpg(NULL), (u64)4096);
if (off < 0)
printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
ft_fixup_num_cores(images->ft_addr);
#endif
flush_cache((unsigned long)images->ft_addr, images->ft_len);
#endif
#endif
}
void boot_jump_vxworks(bootm_headers_t *images)
{
/* PowerPC VxWorks boot interface conforms to the ePAPR standard
* general purpuse registers:
*
* r3: Effective address of the device tree image
* r4: 0
* r5: 0
* r6: ePAPR magic value
* r7: shall be the size of the boot IMA in bytes
* r8: 0
* r9: 0
* TCR: WRC = 0, no watchdog timer reset will occur
*/
WATCHDOG_RESET();
((void (*)(void *, ulong, ulong, ulong,
ulong, ulong, ulong))images->ep)(images->ft_addr,
0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);
}
#endif
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