u-boot/arch/arm/mach-stm32mp/cpu.c
Patrick Delaunay 6df271a70f arm: stm32mp: move code for STM32MP15x
Move code and defines only needed for CONFIG_STM32MP15x in stm32mp15x.c
when low level init without TFABOOT is supported.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
2022-06-17 09:58:21 +02:00

366 lines
8.7 KiB
C

// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
*/
#define LOG_CATEGORY LOGC_ARCH
#include <common.h>
#include <clk.h>
#include <cpu_func.h>
#include <debug_uart.h>
#include <env.h>
#include <init.h>
#include <log.h>
#include <lmb.h>
#include <misc.h>
#include <net.h>
#include <asm/io.h>
#include <asm/arch/stm32.h>
#include <asm/arch/sys_proto.h>
#include <asm/global_data.h>
#include <dm/device.h>
#include <dm/uclass.h>
#include <linux/bitops.h>
/*
* early TLB into the .data section so that it not get cleared
* with 16kB allignment (see TTBR0_BASE_ADDR_MASK)
*/
u8 early_tlb[PGTABLE_SIZE] __section(".data") __aligned(0x4000);
struct lmb lmb;
u32 get_bootmode(void)
{
/* read bootmode from TAMP backup register */
return (readl(TAMP_BOOT_CONTEXT) & TAMP_BOOT_MODE_MASK) >>
TAMP_BOOT_MODE_SHIFT;
}
/*
* weak function overidde: set the DDR/SYSRAM executable before to enable the
* MMU and configure DACR, for early early_enable_caches (SPL or pre-reloc)
*/
void dram_bank_mmu_setup(int bank)
{
struct bd_info *bd = gd->bd;
int i;
phys_addr_t start;
phys_size_t size;
bool use_lmb = false;
enum dcache_option option;
if (IS_ENABLED(CONFIG_SPL_BUILD)) {
start = ALIGN_DOWN(STM32_SYSRAM_BASE, MMU_SECTION_SIZE);
size = ALIGN(STM32_SYSRAM_SIZE, MMU_SECTION_SIZE);
} else if (gd->flags & GD_FLG_RELOC) {
/* bd->bi_dram is available only after relocation */
start = bd->bi_dram[bank].start;
size = bd->bi_dram[bank].size;
use_lmb = true;
} else {
/* mark cacheable and executable the beggining of the DDR */
start = STM32_DDR_BASE;
size = CONFIG_DDR_CACHEABLE_SIZE;
}
for (i = start >> MMU_SECTION_SHIFT;
i < (start >> MMU_SECTION_SHIFT) + (size >> MMU_SECTION_SHIFT);
i++) {
option = DCACHE_DEFAULT_OPTION;
if (use_lmb && lmb_is_reserved_flags(&lmb, i << MMU_SECTION_SHIFT, LMB_NOMAP))
option = 0; /* INVALID ENTRY in TLB */
set_section_dcache(i, option);
}
}
/*
* initialize the MMU and activate cache in SPL or in U-Boot pre-reloc stage
* MMU/TLB is updated in enable_caches() for U-Boot after relocation
* or is deactivated in U-Boot entry function start.S::cpu_init_cp15
*/
static void early_enable_caches(void)
{
/* I-cache is already enabled in start.S: cpu_init_cp15 */
if (CONFIG_IS_ENABLED(SYS_DCACHE_OFF))
return;
if (!(CONFIG_IS_ENABLED(SYS_ICACHE_OFF) && CONFIG_IS_ENABLED(SYS_DCACHE_OFF))) {
gd->arch.tlb_size = PGTABLE_SIZE;
gd->arch.tlb_addr = (unsigned long)&early_tlb;
}
/* enable MMU (default configuration) */
dcache_enable();
}
/*
* Early system init
*/
int arch_cpu_init(void)
{
early_enable_caches();
/* early armv7 timer init: needed for polling */
timer_init();
return 0;
}
/* weak function for SOC specific initialization */
__weak void stm32mp_cpu_init(void)
{
}
int mach_cpu_init(void)
{
u32 boot_mode;
stm32mp_cpu_init();
boot_mode = get_bootmode();
if (IS_ENABLED(CONFIG_CMD_STM32PROG_SERIAL) &&
(boot_mode & TAMP_BOOT_DEVICE_MASK) == BOOT_SERIAL_UART)
gd->flags |= GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE;
else if (IS_ENABLED(CONFIG_DEBUG_UART) && IS_ENABLED(CONFIG_SPL_BUILD))
debug_uart_init();
return 0;
}
void enable_caches(void)
{
/* parse device tree when data cache is still activated */
lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
/* I-cache is already enabled in start.S: icache_enable() not needed */
/* deactivate the data cache, early enabled in arch_cpu_init() */
dcache_disable();
/*
* update MMU after relocation and enable the data cache
* warning: the TLB location udpated in board_f.c::reserve_mmu
*/
dcache_enable();
}
/* used when CONFIG_DISPLAY_CPUINFO is activated */
int print_cpuinfo(void)
{
char name[SOC_NAME_SIZE];
get_soc_name(name);
printf("CPU: %s\n", name);
return 0;
}
static void setup_boot_mode(void)
{
const u32 serial_addr[] = {
STM32_USART1_BASE,
STM32_USART2_BASE,
STM32_USART3_BASE,
STM32_UART4_BASE,
STM32_UART5_BASE,
STM32_USART6_BASE,
STM32_UART7_BASE,
STM32_UART8_BASE
};
const u32 sdmmc_addr[] = {
STM32_SDMMC1_BASE,
STM32_SDMMC2_BASE,
STM32_SDMMC3_BASE
};
char cmd[60];
u32 boot_ctx = readl(TAMP_BOOT_CONTEXT);
u32 boot_mode =
(boot_ctx & TAMP_BOOT_MODE_MASK) >> TAMP_BOOT_MODE_SHIFT;
unsigned int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1;
u32 forced_mode = (boot_ctx & TAMP_BOOT_FORCED_MASK);
struct udevice *dev;
log_debug("%s: boot_ctx=0x%x => boot_mode=%x, instance=%d forced=%x\n",
__func__, boot_ctx, boot_mode, instance, forced_mode);
switch (boot_mode & TAMP_BOOT_DEVICE_MASK) {
case BOOT_SERIAL_UART:
if (instance > ARRAY_SIZE(serial_addr))
break;
/* serial : search associated node in devicetree */
sprintf(cmd, "serial@%x", serial_addr[instance]);
if (uclass_get_device_by_name(UCLASS_SERIAL, cmd, &dev)) {
/* restore console on error */
if (IS_ENABLED(CONFIG_CMD_STM32PROG_SERIAL))
gd->flags &= ~(GD_FLG_SILENT |
GD_FLG_DISABLE_CONSOLE);
log_err("uart%d = %s not found in device tree!\n",
instance + 1, cmd);
break;
}
sprintf(cmd, "%d", dev_seq(dev));
env_set("boot_device", "serial");
env_set("boot_instance", cmd);
/* restore console on uart when not used */
if (IS_ENABLED(CONFIG_CMD_STM32PROG_SERIAL) && gd->cur_serial_dev != dev) {
gd->flags &= ~(GD_FLG_SILENT |
GD_FLG_DISABLE_CONSOLE);
log_info("serial boot with console enabled!\n");
}
break;
case BOOT_SERIAL_USB:
env_set("boot_device", "usb");
env_set("boot_instance", "0");
break;
case BOOT_FLASH_SD:
case BOOT_FLASH_EMMC:
if (instance > ARRAY_SIZE(sdmmc_addr))
break;
/* search associated sdmmc node in devicetree */
sprintf(cmd, "mmc@%x", sdmmc_addr[instance]);
if (uclass_get_device_by_name(UCLASS_MMC, cmd, &dev)) {
printf("mmc%d = %s not found in device tree!\n",
instance, cmd);
break;
}
sprintf(cmd, "%d", dev_seq(dev));
env_set("boot_device", "mmc");
env_set("boot_instance", cmd);
break;
case BOOT_FLASH_NAND:
env_set("boot_device", "nand");
env_set("boot_instance", "0");
break;
case BOOT_FLASH_SPINAND:
env_set("boot_device", "spi-nand");
env_set("boot_instance", "0");
break;
case BOOT_FLASH_NOR:
env_set("boot_device", "nor");
env_set("boot_instance", "0");
break;
default:
env_set("boot_device", "invalid");
env_set("boot_instance", "");
log_err("unexpected boot mode = %x\n", boot_mode);
break;
}
switch (forced_mode) {
case BOOT_FASTBOOT:
log_info("Enter fastboot!\n");
env_set("preboot", "env set preboot; fastboot 0");
break;
case BOOT_STM32PROG:
env_set("boot_device", "usb");
env_set("boot_instance", "0");
break;
case BOOT_UMS_MMC0:
case BOOT_UMS_MMC1:
case BOOT_UMS_MMC2:
log_info("Enter UMS!\n");
instance = forced_mode - BOOT_UMS_MMC0;
sprintf(cmd, "env set preboot; ums 0 mmc %d", instance);
env_set("preboot", cmd);
break;
case BOOT_RECOVERY:
env_set("preboot", "env set preboot; run altbootcmd");
break;
case BOOT_NORMAL:
break;
default:
log_debug("unexpected forced boot mode = %x\n", forced_mode);
break;
}
/* clear TAMP for next reboot */
clrsetbits_le32(TAMP_BOOT_CONTEXT, TAMP_BOOT_FORCED_MASK, BOOT_NORMAL);
}
/*
* If there is no MAC address in the environment, then it will be initialized
* (silently) from the value in the OTP.
*/
__weak int setup_mac_address(void)
{
int ret;
int i;
u32 otp[2];
uchar enetaddr[6];
struct udevice *dev;
if (!IS_ENABLED(CONFIG_NET))
return 0;
/* MAC already in environment */
if (eth_env_get_enetaddr("ethaddr", enetaddr))
return 0;
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_DRIVER_GET(stm32mp_bsec),
&dev);
if (ret)
return ret;
ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_MAC),
otp, sizeof(otp));
if (ret < 0)
return ret;
for (i = 0; i < 6; i++)
enetaddr[i] = ((uint8_t *)&otp)[i];
if (!is_valid_ethaddr(enetaddr)) {
log_err("invalid MAC address in OTP %pM\n", enetaddr);
return -EINVAL;
}
log_debug("OTP MAC address = %pM\n", enetaddr);
ret = eth_env_set_enetaddr("ethaddr", enetaddr);
if (ret)
log_err("Failed to set mac address %pM from OTP: %d\n", enetaddr, ret);
return 0;
}
static int setup_serial_number(void)
{
char serial_string[25];
u32 otp[3] = {0, 0, 0 };
struct udevice *dev;
int ret;
if (env_get("serial#"))
return 0;
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_DRIVER_GET(stm32mp_bsec),
&dev);
if (ret)
return ret;
ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_SERIAL),
otp, sizeof(otp));
if (ret < 0)
return ret;
sprintf(serial_string, "%08X%08X%08X", otp[0], otp[1], otp[2]);
env_set("serial#", serial_string);
return 0;
}
__weak void stm32mp_misc_init(void)
{
}
int arch_misc_init(void)
{
setup_boot_mode();
setup_mac_address();
setup_serial_number();
stm32mp_misc_init();
return 0;
}