Add code to init the system both in TPL and SPL. Each phase has its own procedure.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v5: None Changes in v4: - Switch over to use pinctrl for pad init/config
Changes in v3: - Adjust fast_spi_cache_bios_region() to avoid using SPI driver - Drop calls to x86_cpu_init_f(), x86_cpu_reinit_f() - Fix build error when debug UART is disabled - Init the p2sb before the northbridge since the latter so it can use GPIOs - Move location of fast_spi.h header file - Shorten log_msg_ret() calls since the function name is always printed - Support TPL without CONFIG_TPL_SPI_SUPPORT (reduces code size)
Changes in v2: None
arch/x86/cpu/apollolake/Makefile | 1 + arch/x86/cpu/apollolake/cpu_spl.c | 274 ++++++++++++++++++++++++++++++ 2 files changed, 275 insertions(+) create mode 100644 arch/x86/cpu/apollolake/cpu_spl.c
diff --git a/arch/x86/cpu/apollolake/Makefile b/arch/x86/cpu/apollolake/Makefile index 37e42092ec..edde122f75 100644 --- a/arch/x86/cpu/apollolake/Makefile +++ b/arch/x86/cpu/apollolake/Makefile @@ -2,6 +2,7 @@ # # Copyright 2019 Google LLC
+obj-$(CONFIG_SPL_BUILD) += cpu_spl.o obj-$(CONFIG_SPL_BUILD) += spl.o obj-$(CONFIG_SPL_BUILD) += systemagent.o obj-y += cpu_common.o diff --git a/arch/x86/cpu/apollolake/cpu_spl.c b/arch/x86/cpu/apollolake/cpu_spl.c new file mode 100644 index 0000000000..3298448352 --- /dev/null +++ b/arch/x86/cpu/apollolake/cpu_spl.c @@ -0,0 +1,274 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 Google LLC + * + * Portions taken from coreboot + */ + +#include <common.h> +#include <acpi_s3.h> +#include <dm.h> +#include <ec_commands.h> +#include <log.h> +#include <spi_flash.h> +#include <spl.h> +#include <syscon.h> +#include <asm/cpu.h> +#include <asm/cpu_common.h> +#include <asm/cpu_x86.h> +#include <asm/fast_spi.h> +#include <asm/intel_pinctrl.h> +#include <asm/intel_regs.h> +#include <asm/io.h> +#include <asm/msr.h> +#include <asm/mtrr.h> +#include <asm/pci.h> +#include <asm/arch/cpu.h> +#include <asm/arch/gpio.h> +#include <asm/arch/iomap.h> +#include <asm/arch/lpc.h> +#include <asm/arch/pch.h> +#include <asm/arch/systemagent.h> +#include <asm/arch/uart.h> +#include <asm/fsp2/fsp_api.h> +#include <power/acpi_pmc.h> + +/* Define this here to avoid referencing any drivers for the debug UART 1 */ +#define PCH_DEV_P2SB PCI_BDF(0, 0x0d, 0) + +static void pch_uart_init(void) +{ + /* + * Set up the pinmux so that the UART rx/tx signals are connected + * outside the SoC. + * + * There are about 500 lines of code required to program the GPIO + * configuration for the UARTs. But it boils down to four writes, and + * for the debug UART we want the minimum possible amount of code before + * the UART is running. So just add the magic writes here. See + * apl_gpio_early_init() for the full horror. + */ + if (PCI_FUNC(PCH_DEV_UART) == 1) { + writel(0x40000402, 0xd0c50650); + writel(0x3c47, 0xd0c50654); + writel(0x40000400, 0xd0c50658); + writel(0x3c48, 0xd0c5065c); + } else { /* UART2 */ + writel(0x40000402, 0xd0c50670); + writel(0x3c4b, 0xd0c50674); + writel(0x40000400, 0xd0c50678); + writel(0x3c4c, 0xd0c5067c); + } + +#ifdef CONFIG_DEBUG_UART + apl_uart_init(PCH_DEV_UART, CONFIG_DEBUG_UART_BASE); +#endif +} + +static void p2sb_enable_bar(ulong bar) +{ + /* Enable PCR Base address in PCH */ + pci_x86_write_config(PCH_DEV_P2SB, PCI_BASE_ADDRESS_0, bar, + PCI_SIZE_32); + pci_x86_write_config(PCH_DEV_P2SB, PCI_BASE_ADDRESS_1, 0, PCI_SIZE_32); + + /* Enable P2SB MSE */ + pci_x86_write_config(PCH_DEV_P2SB, PCI_COMMAND, + PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY, + PCI_SIZE_8); +} + +/* + * init_for_uart() - Init the debug UART ready for use + * + * This is the minimum init needed to get the UART running. It avoids any + * drivers or complex code, so that the UART is running as soon as possible. + */ +static void init_for_uart(void) +{ + p2sb_enable_bar(IOMAP_P2SB_BAR); + pch_uart_init(); +} + +static int fast_spi_cache_bios_region(void) +{ + uint map_size, offset; + ulong map_base, base; + int ret; + + ret = fast_spi_early_init(PCH_DEV_SPI, IOMAP_SPI_BASE); + if (ret) + return log_msg_ret("early_init", ret); + + ret = fast_spi_get_bios_mmap(PCH_DEV_SPI, &map_base, &map_size, + &offset); + if (ret) + return log_msg_ret("get_mmap", ret); + + base = (4ULL << 30) - map_size; + mtrr_set_next_var(MTRR_TYPE_WRPROT, base, map_size); + log_debug("BIOS cache base=%lx, size=%x\n", base, (uint)map_size); + + return 0; +} + +static void enable_pm_timer_emulation(struct udevice *pmc) +{ + struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(pmc); + msr_t msr; + + /* + * The derived frequency is calculated as follows: + * (CTC_FREQ * msr[63:32]) >> 32 = target frequency. + * + * Back-solve the multiplier so the 3.579545MHz ACPI timer frequency is + * used. + */ + msr.hi = (3579545ULL << 32) / CTC_FREQ; + + /* Set PM1 timer IO port and enable */ + msr.lo = EMULATE_PM_TMR_EN | (upriv->acpi_base + R_ACPI_PM1_TMR); + debug("PM timer %x %x\n", msr.hi, msr.lo); + msr_write(MSR_EMULATE_PM_TIMER, msr); +} + +static void google_chromeec_ioport_range(uint *out_basep, uint *out_sizep) +{ + uint base; + uint size; + + if (IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC_MEC)) { + base = MEC_EMI_BASE; + size = MEC_EMI_SIZE; + } else { + base = EC_HOST_CMD_REGION0; + size = 2 * EC_HOST_CMD_REGION_SIZE; + /* Make sure MEMMAP region follows host cmd region */ + assert(base + size == EC_LPC_ADDR_MEMMAP); + size += EC_MEMMAP_SIZE; + } + + *out_basep = base; + *out_sizep = size; +} + +static void early_ec_init(void) +{ + uint base, size; + + /* + * Set up LPC decoding for the Chrome OS EC I/O port ranges: + * - Ports 62/66, 60/64, and 200->208 + * - Chrome OS EC communication I/O ports + */ + lpc_enable_fixed_io_ranges(LPC_IOE_EC_62_66 | LPC_IOE_KBC_60_64 | + LPC_IOE_LGE_200); + google_chromeec_ioport_range(&base, &size); + lpc_open_pmio_window(base, size); +} + +static int arch_cpu_init_tpl(void) +{ + struct udevice *pmc, *sa, *p2sb, *serial, *spi, *lpc; + int ret; + + ret = uclass_first_device_err(UCLASS_ACPI_PMC, &pmc); + if (ret) + return log_msg_ret("PMC", ret); + + /* Clear global reset promotion bit */ + ret = pmc_global_reset_set_enable(pmc, false); + if (ret) + return log_msg_ret("disable global reset", ret); + + enable_pm_timer_emulation(pmc); + + ret = uclass_first_device_err(UCLASS_P2SB, &p2sb); + if (ret) + return log_msg_ret("p2sb", ret); + ret = uclass_first_device_err(UCLASS_NORTHBRIDGE, &sa); + if (ret) + return log_msg_ret("northbridge", ret); + gd->baudrate = CONFIG_BAUDRATE; + ret = uclass_first_device_err(UCLASS_SERIAL, &serial); + if (ret) + return log_msg_ret("serial", ret); + if (CONFIG_IS_ENABLED(SPI_FLASH_SUPPORT)) { + ret = uclass_first_device_err(UCLASS_SPI, &spi); + if (ret) + return log_msg_ret("SPI", ret); + } else { + /* Alternative code if we don't have SPI in TPL */ + if (BOOT_FROM_FAST_SPI_FLASH) + printf("Warning: Enable APL_SPI_FLASHBOOT to use SPI-flash driver in TPL"); + ret = fast_spi_cache_bios_region(); + if (ret) + return log_msg_ret("BIOS cache", ret); + } + ret = pmc_disable_tco(pmc); + if (ret) + return log_msg_ret("disable TCO", ret); + ret = pmc_gpe_init(pmc); + if (ret) + return log_msg_ret("pmc_gpe", ret); + ret = uclass_first_device_err(UCLASS_LPC, &lpc); + if (ret) + return log_msg_ret("lpc", ret); + + early_ec_init(); + + return 0; +} + +/* + * Enables several BARs and devices which are needed for memory init + * - MCH_BASE_ADDR is needed in order to talk to the memory controller + * - HPET is enabled because FSP wants to store a pointer to global data in the + * HPET comparator register + */ +static int arch_cpu_init_spl(void) +{ + struct udevice *pmc, *p2sb; + int ret; + + ret = uclass_first_device_err(UCLASS_ACPI_PMC, &pmc); + if (ret) + return log_msg_ret("Could not probe PMC", ret); + ret = uclass_first_device_err(UCLASS_P2SB, &p2sb); + if (ret) + return log_msg_ret("Cannot set up p2sb", ret); + + lpc_io_setup_comm_a_b(); + /* enable_rtc_upper_bank(); */ + + ret = pmc_init(pmc); + if (ret < 0) + return log_msg_ret("Could not init PMC", ret); +#ifdef CONFIG_HAVE_ACPI_RESUME + ret = pmc_prev_sleep_state(pmc); + if (ret < 0) + return log_msg_ret("Could not get PMC sleep state", ret); + gd->arch.prev_sleep_state = ret; +#endif + + return 0; +} + +int arch_cpu_init(void) +{ + int ret = 0; + + if (spl_phase() == PHASE_TPL) + ret = arch_cpu_init_tpl(); + else if (spl_phase() == PHASE_SPL) + ret = arch_cpu_init_spl(); + if (ret) + printf("%s: Error %d\n", __func__, ret); + + return ret; +} + +void board_debug_uart_init(void) +{ + init_for_uart(); +}