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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 <bootstage.h>
#include <cpu_func.h>
#include <env.h>
#include <init.h>
#include <lmb.h>
#include <log.h>
#include <watchdog.h>
#include <command.h>
#include <image.h>
#include <malloc.h>
#include <asm/global_data.h>
#include <u-boot/zlib.h>
#include <bzlib.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 (struct bd_info *kbd);
#ifndef CFG_SYS_LINUX_LOWMEM_MAX_SIZE
#define CFG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
#endif
static void boot_jump_linux(struct bootm_headers *images)
{
void (*kernel)(struct bd_info *, 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 (*)(struct bd_info *, 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");
schedule();
(*kernel) ((struct bd_info *)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;
struct bd_info *kbd = images->kbd;
debug(" Booting using board info...\n");
schedule();
(*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, bootmap_base;
bootmap_base = env_get_bootm_low();
bootm_size = env_get_bootm_size();
#ifdef DEBUG
if (((u64)bootmap_base + bootm_size) >
(CFG_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)CFG_SYS_LINUX_LOWMEM_MAX_SIZE);
if (size < bootm_size) {
ulong base = bootmap_base + size;
printf("WARNING: adjusting available memory from 0x%lx to 0x%llx\n",
size, (unsigned long long)bootm_size);
lmb_reserve(lmb, base, bootm_size - size);
}
arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 4096);
#ifdef CONFIG_MP
cpu_mp_lmb_reserve(lmb);
#endif
return;
}
static void boot_prep_linux(struct bootm_headers *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(struct bootm_headers *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(struct bootm_headers *images)
{
ulong of_size = images->ft_len;
struct lmb *lmb = &images->lmb;
struct bd_info **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(struct bootm_headers *images)
{
int ret;
/* allocate space for kernel copy of board info */
ret = boot_bd_t_linux(images);
if (ret)
return ret;
if (IS_ENABLED(CONFIG_LMB)) {
ret = image_setup_linux(images);
if (ret)
return ret;
}
return 0;
}
noinline int do_bootm_linux(int flag, int argc, char *const argv[],
struct bootm_headers *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 (struct bd_info *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_BOOTM_VXWORKS)
void boot_prep_vxworks(struct bootm_headers *images)
{
#if defined(CONFIG_OF_LIBFDT)
int off;
u64 base, size;
if (!images->ft_addr)
return;
base = (u64)gd->ram_base;
size = (u64)gd->ram_size;
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(struct bootm_headers *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
*/
schedule();
((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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