/* SPDX-License-Identifier: GPL-2.0-only */ #include <stdint.h> #include <assert.h> #include <console/console.h> #include <cpu/x86/msr.h> #include <cpu/amd/msr.h> #include <cpu/x86/mtrr.h> #include <smp/node.h> #include <bootblock_common.h> #include <amdblocks/agesawrapper.h> #include <amdblocks/agesawrapper_call.h> #include <amdblocks/amd_pci_mmconf.h> #include <amdblocks/biosram.h> #include <amdblocks/i2c.h> #include <soc/pci_devs.h> #include <soc/cpu.h> #include <soc/southbridge.h> #include <timestamp.h> #include <halt.h> #include "chip.h" #if CONFIG_PI_AGESA_TEMP_RAM_BASE < 0x100000 #error "Error: CONFIG_PI_AGESA_TEMP_RAM_BASE must be >= 1MB" #endif #if CONFIG_PI_AGESA_CAR_HEAP_BASE < 0x100000 #error "Error: CONFIG_PI_AGESA_CAR_HEAP_BASE must be >= 1MB" #endif /* Table to switch SCL pins to outputs to initially reset the I2C peripherals */ static const struct soc_i2c_scl_pin i2c_scl_pins[] = { I2C_RESET_SCL_PIN(I2C0_SCL_PIN, GPIO_I2C0_SCL), I2C_RESET_SCL_PIN(I2C1_SCL_PIN, GPIO_I2C1_SCL), I2C_RESET_SCL_PIN(I2C2_SCL_PIN, GPIO_I2C2_SCL), I2C_RESET_SCL_PIN(I2C3_SCL_PIN, GPIO_I2C3_SCL), }; /* Set the MMIO Configuration Base Address, Bus Range, and misc MTRRs. */ static void amd_initmmio(void) { msr_t mtrr_cap = rdmsr(MTRR_CAP_MSR); int mtrr; /* * todo: AGESA currently writes variable MTRRs. Once that is * corrected, un-hardcode this MTRR. * * Be careful not to use get_free_var_mtrr/set_var_mtrr pairs * where all cores execute the path. Both cores within a compute * unit share MTRRs. Programming core0 has the appearance of * modifying core1 too. Using the pair again will create * duplicate copies. */ mtrr = (mtrr_cap.lo & MTRR_CAP_VCNT) - SOC_EARLY_VMTRR_FLASH; set_var_mtrr(mtrr, FLASH_BASE_ADDR, CONFIG_ROM_SIZE, MTRR_TYPE_WRPROT); mtrr = (mtrr_cap.lo & MTRR_CAP_VCNT) - SOC_EARLY_VMTRR_CAR_HEAP; set_var_mtrr(mtrr, CONFIG_PI_AGESA_CAR_HEAP_BASE, CONFIG_PI_AGESA_HEAP_SIZE, MTRR_TYPE_WRBACK); mtrr = (mtrr_cap.lo & MTRR_CAP_VCNT) - SOC_EARLY_VMTRR_TEMPRAM; set_var_mtrr(mtrr, CONFIG_PI_AGESA_TEMP_RAM_BASE, CONFIG_PI_AGESA_HEAP_SIZE, MTRR_TYPE_UNCACHEABLE); } static void reset_i2c_peripherals(void) { const struct soc_amd_stoneyridge_config *cfg = config_of_soc(); struct soc_i2c_peripheral_reset_info reset_info; reset_info.i2c_scl_reset_mask = cfg->i2c_scl_reset & GPIO_I2C_MASK; reset_info.i2c_scl = i2c_scl_pins; reset_info.num_pins = ARRAY_SIZE(i2c_scl_pins); sb_reset_i2c_peripherals(&reset_info); } asmlinkage void bootblock_c_entry(uint64_t base_timestamp) { enable_pci_mmconf(); amd_initmmio(); /* * Call lib/bootblock.c main with BSP, shortcut for APs */ if (!boot_cpu()) { void (*ap_romstage_entry)(void) = (void (*)(void))get_ap_entry_ptr(); ap_romstage_entry(); /* execution does not return */ halt(); } /* TSC cannot be relied upon. Override the TSC value passed in. */ bootblock_main_with_basetime(timestamp_get()); } void bootblock_soc_early_init(void) { /* * This call (sb_reset_i2c_peripherals) was originally early at * bootblock_c_entry, but had to be moved here. There was an * unexplained delay in the middle of the i2c transaction when * we had it in bootblock_c_entry. Moving it to this point * (or adding delays) fixes the issue. It seems like the processor * just pauses but we don't know why. */ reset_i2c_peripherals(); bootblock_fch_early_init(); post_code(0x90); } void bootblock_soc_init(void) { if (CONFIG(AMD_SOC_CONSOLE_UART)) assert(CONFIG_UART_FOR_CONSOLE >= 0 && CONFIG_UART_FOR_CONSOLE <= 1); u32 val = cpuid_eax(1); printk(BIOS_DEBUG, "Family_Model: %08x\n", val); bootblock_fch_init(); /* Initialize any early i2c buses. */ i2c_soc_early_init(); }