| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2013 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stddef.h> |
| #include <arch/cpu.h> |
| #include <arch/io.h> |
| #include <arch/cbfs.h> |
| #include <arch/stages.h> |
| #include <arch/early_variables.h> |
| #include <console/console.h> |
| #include <cbmem.h> |
| #include <cpu/x86/mtrr.h> |
| #if CONFIG_EC_GOOGLE_CHROMEEC |
| #include <ec/google/chromeec/ec.h> |
| #endif |
| #include <elog.h> |
| #include <ramstage_cache.h> |
| #include <romstage_handoff.h> |
| #include <timestamp.h> |
| #include <vendorcode/google/chromeos/chromeos.h> |
| #include <baytrail/gpio.h> |
| #include <baytrail/iomap.h> |
| #include <baytrail/lpc.h> |
| #include <baytrail/pci_devs.h> |
| #include <baytrail/pmc.h> |
| #include <baytrail/reset.h> |
| #include <baytrail/romstage.h> |
| #include <baytrail/smm.h> |
| #include <baytrail/spi.h> |
| |
| static inline uint64_t timestamp_get(void) |
| { |
| return rdtscll(); |
| } |
| |
| static inline tsc_t ts64_to_tsc(uint64_t ts) |
| { |
| tsc_t tsc = { |
| .lo = ts, |
| .hi = ts >> 32, |
| }; |
| return tsc; |
| } |
| |
| /* The cache-as-ram assembly file calls romstage_main() after setting up |
| * cache-as-ram. romstage_main() will then call the mainboards's |
| * mainboard_romstage_entry() function. That function then calls |
| * romstage_common() below. The reason for the back and forth is to provide |
| * common entry point from cache-as-ram while still allowing for code sharing. |
| * Because we can't use global variables the stack is used for allocations -- |
| * thus the need to call back and forth. */ |
| |
| static void *setup_stack_and_mttrs(void); |
| |
| static void program_base_addresses(void) |
| { |
| uint32_t reg; |
| const uint32_t lpc_dev = PCI_DEV(0, LPC_DEV, LPC_FUNC); |
| |
| /* Memory Mapped IO registers. */ |
| reg = PMC_BASE_ADDRESS | 2; |
| pci_write_config32(lpc_dev, PBASE, reg); |
| reg = IO_BASE_ADDRESS | 2; |
| pci_write_config32(lpc_dev, IOBASE, reg); |
| reg = ILB_BASE_ADDRESS | 2; |
| pci_write_config32(lpc_dev, IBASE, reg); |
| reg = SPI_BASE_ADDRESS | 2; |
| pci_write_config32(lpc_dev, SBASE, reg); |
| reg = MPHY_BASE_ADDRESS | 2; |
| pci_write_config32(lpc_dev, MPBASE, reg); |
| reg = PUNIT_BASE_ADDRESS | 2; |
| pci_write_config32(lpc_dev, PUBASE, reg); |
| reg = RCBA_BASE_ADDRESS | 1; |
| pci_write_config32(lpc_dev, RCBA, reg); |
| |
| /* IO Port Registers. */ |
| reg = ACPI_BASE_ADDRESS | 2; |
| pci_write_config32(lpc_dev, ABASE, reg); |
| reg = GPIO_BASE_ADDRESS | 2; |
| pci_write_config32(lpc_dev, GBASE, reg); |
| } |
| |
| static void spi_init(void) |
| { |
| const unsigned long scs = SPI_BASE_ADDRESS + SCS; |
| const unsigned long bcr = SPI_BASE_ADDRESS + BCR; |
| uint32_t reg; |
| |
| /* Disable generating SMI when setting WPD bit. */ |
| write32(scs, read32(scs) & ~SMIWPEN); |
| /* |
| * Enable caching and prefetching in the SPI controller. Disable |
| * the SMM-only BIOS write and set WPD bit. |
| */ |
| reg = (read32(bcr) & ~SRC_MASK) | SRC_CACHE_PREFETCH | BCR_WPD; |
| reg &= ~EISS; |
| write32(bcr, reg); |
| } |
| |
| static inline void mark_ts(struct romstage_params *rp, uint64_t ts) |
| { |
| struct romstage_timestamps *rt = &rp->ts; |
| |
| rt->times[rt->count] = ts; |
| rt->count++; |
| } |
| |
| /* Entry from cache-as-ram.inc. */ |
| void * asmlinkage romstage_main(unsigned long bist, |
| uint32_t tsc_low, uint32_t tsc_hi) |
| { |
| struct romstage_params rp = { |
| .bist = bist, |
| .mrc_params = NULL, |
| }; |
| |
| /* Save initial timestamp from bootblock. */ |
| mark_ts(&rp, (((uint64_t)tsc_hi) << 32) | (uint64_t)tsc_low); |
| /* Save romstage begin */ |
| mark_ts(&rp, timestamp_get()); |
| |
| program_base_addresses(); |
| |
| tco_disable(); |
| |
| byt_config_com1_and_enable(); |
| |
| console_init(); |
| |
| spi_init(); |
| |
| set_max_freq(); |
| |
| punit_init(); |
| |
| gfx_init(); |
| |
| #if CONFIG_EC_GOOGLE_CHROMEEC |
| /* Ensure the EC is in the right mode for recovery */ |
| google_chromeec_early_init(); |
| #endif |
| |
| /* Call into mainboard. */ |
| mainboard_romstage_entry(&rp); |
| |
| return setup_stack_and_mttrs(); |
| } |
| |
| static struct chipset_power_state power_state CAR_GLOBAL; |
| |
| static void migrate_power_state(void) |
| { |
| struct chipset_power_state *ps_cbmem; |
| struct chipset_power_state *ps_car; |
| |
| ps_car = car_get_var_ptr(&power_state); |
| ps_cbmem = cbmem_add(CBMEM_ID_POWER_STATE, sizeof(*ps_cbmem)); |
| |
| if (ps_cbmem == NULL) { |
| printk(BIOS_DEBUG, "Not adding power state to cbmem!\n"); |
| return; |
| } |
| memcpy(ps_cbmem, ps_car, sizeof(*ps_cbmem)); |
| } |
| CAR_MIGRATE(migrate_power_state); |
| |
| static struct chipset_power_state *fill_power_state(void) |
| { |
| struct chipset_power_state *ps = car_get_var_ptr(&power_state); |
| |
| ps->pm1_sts = inw(ACPI_BASE_ADDRESS + PM1_STS); |
| ps->pm1_en = inw(ACPI_BASE_ADDRESS + PM1_EN); |
| ps->pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT); |
| ps->gpe0_sts = inl(ACPI_BASE_ADDRESS + GPE0_STS); |
| ps->gpe0_en = inl(ACPI_BASE_ADDRESS + GPE0_EN); |
| ps->tco_sts = inl(ACPI_BASE_ADDRESS + TCO_STS); |
| ps->prsts = read32(PMC_BASE_ADDRESS + PRSTS); |
| ps->gen_pmcon1 = read32(PMC_BASE_ADDRESS + GEN_PMCON1); |
| ps->gen_pmcon2 = read32(PMC_BASE_ADDRESS + GEN_PMCON2); |
| |
| printk(BIOS_DEBUG, "pm1_sts: %04x pm1_en: %04x pm1_cnt: %08x\n", |
| ps->pm1_sts, ps->pm1_en, ps->pm1_cnt); |
| printk(BIOS_DEBUG, "gpe0_sts: %08x gpe0_en: %08x tco_sts: %08x\n", |
| ps->gpe0_sts, ps->gpe0_en, ps->tco_sts); |
| printk(BIOS_DEBUG, "prsts: %08x gen_pmcon1: %08x gen_pmcon2: %08x\n", |
| ps->prsts, ps->gen_pmcon1, ps->gen_pmcon2); |
| |
| return ps; |
| } |
| |
| /* Return 0, 3, or 5 to indicate the previous sleep state. */ |
| static int chipset_prev_sleep_state(struct chipset_power_state *ps) |
| { |
| /* Default to S0. */ |
| int prev_sleep_state = 0; |
| |
| if (ps->pm1_sts & WAK_STS) { |
| switch ((ps->pm1_cnt & SLP_TYP) >> SLP_TYP_SHIFT) { |
| #if CONFIG_HAVE_ACPI_RESUME |
| case SLP_TYP_S3: |
| prev_sleep_state = 3; |
| break; |
| #endif |
| case SLP_TYP_S5: |
| prev_sleep_state = 5; |
| break; |
| } |
| /* Clear SLP_TYP. */ |
| outl(ps->pm1_cnt & ~(SLP_TYP), ACPI_BASE_ADDRESS + PM1_CNT); |
| } |
| |
| if (ps->gen_pmcon1 & (PWR_FLR | SUS_PWR_FLR)) { |
| prev_sleep_state = 5; |
| } |
| |
| return prev_sleep_state; |
| } |
| |
| static inline void chromeos_init(int prev_sleep_state) |
| { |
| #if CONFIG_CHROMEOS |
| /* Normalize the sleep state to what init_chromeos() wants for S3: 2. */ |
| init_chromeos(prev_sleep_state == 3 ? 2 : 0); |
| #endif |
| } |
| |
| /* Entry from the mainboard. */ |
| void romstage_common(struct romstage_params *params) |
| { |
| struct romstage_handoff *handoff; |
| struct chipset_power_state *ps; |
| int prev_sleep_state; |
| |
| mark_ts(params, timestamp_get()); |
| |
| ps = fill_power_state(); |
| prev_sleep_state = chipset_prev_sleep_state(ps); |
| |
| printk(BIOS_DEBUG, "prev_sleep_state = S%d\n", prev_sleep_state); |
| |
| #if CONFIG_ELOG_BOOT_COUNT |
| if (prev_sleep_state != 3) |
| boot_count_increment(); |
| #endif |
| |
| |
| /* Initialize RAM */ |
| raminit(params->mrc_params, prev_sleep_state); |
| |
| mark_ts(params, timestamp_get()); |
| |
| handoff = romstage_handoff_find_or_add(); |
| if (handoff != NULL) |
| handoff->s3_resume = (prev_sleep_state == 3); |
| else |
| printk(BIOS_DEBUG, "Romstage handoff structure not added!\n"); |
| |
| chromeos_init(prev_sleep_state); |
| |
| /* Save timestamp information. */ |
| timestamp_init(ts64_to_tsc(params->ts.times[0])); |
| timestamp_add(TS_START_ROMSTAGE, ts64_to_tsc(params->ts.times[1])); |
| timestamp_add(TS_BEFORE_INITRAM, ts64_to_tsc(params->ts.times[2])); |
| timestamp_add(TS_AFTER_INITRAM, ts64_to_tsc(params->ts.times[3])); |
| } |
| |
| void asmlinkage romstage_after_car(void) |
| { |
| timestamp_add_now(TS_END_ROMSTAGE); |
| |
| /* Load the ramstage. */ |
| copy_and_run(); |
| while (1); |
| } |
| |
| static inline uint32_t *stack_push(u32 *stack, u32 value) |
| { |
| stack = &stack[-1]; |
| *stack = value; |
| return stack; |
| } |
| |
| /* Romstage needs quite a bit of stack for decompressing images since the lzma |
| * lib keeps its state on the stack during romstage. */ |
| static unsigned long choose_top_of_stack(void) |
| { |
| unsigned long stack_top; |
| const unsigned long romstage_ram_stack_size = 0x5000; |
| |
| /* cbmem_add() does a find() before add(). */ |
| stack_top = (unsigned long)cbmem_add(CBMEM_ID_ROMSTAGE_RAM_STACK, |
| romstage_ram_stack_size); |
| stack_top += romstage_ram_stack_size; |
| return stack_top; |
| } |
| |
| /* setup_stack_and_mttrs() determines the stack to use after |
| * cache-as-ram is torn down as well as the MTRR settings to use. */ |
| static void *setup_stack_and_mttrs(void) |
| { |
| unsigned long top_of_stack; |
| int num_mtrrs; |
| uint32_t *slot; |
| uint32_t mtrr_mask_upper; |
| uint32_t top_of_ram; |
| |
| /* Top of stack needs to be aligned to a 4-byte boundary. */ |
| top_of_stack = choose_top_of_stack() & ~3; |
| slot = (void *)top_of_stack; |
| num_mtrrs = 0; |
| |
| /* The upper bits of the MTRR mask need to set according to the number |
| * of physical address bits. */ |
| mtrr_mask_upper = (1 << ((cpuid_eax(0x80000008) & 0xff) - 32)) - 1; |
| |
| /* The order for each MTRR is value then base with upper 32-bits of |
| * each value coming before the lower 32-bits. The reasoning for |
| * this ordering is to create a stack layout like the following: |
| * +0: Number of MTRRs |
| * +4: MTRR base 0 31:0 |
| * +8: MTRR base 0 63:32 |
| * +12: MTRR mask 0 31:0 |
| * +16: MTRR mask 0 63:32 |
| * +20: MTRR base 1 31:0 |
| * +24: MTRR base 1 63:32 |
| * +28: MTRR mask 1 31:0 |
| * +32: MTRR mask 1 63:32 |
| */ |
| |
| /* Cache the ROM as WP just below 4GiB. */ |
| slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ |
| slot = stack_push(slot, ~(CONFIG_ROM_SIZE - 1) | MTRRphysMaskValid); |
| slot = stack_push(slot, 0); /* upper base */ |
| slot = stack_push(slot, ~(CONFIG_ROM_SIZE - 1) | MTRR_TYPE_WRPROT); |
| num_mtrrs++; |
| |
| /* Cache RAM as WB from 0 -> CONFIG_RAMTOP. */ |
| slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ |
| slot = stack_push(slot, ~(CONFIG_RAMTOP - 1) | MTRRphysMaskValid); |
| slot = stack_push(slot, 0); /* upper base */ |
| slot = stack_push(slot, 0 | MTRR_TYPE_WRBACK); |
| num_mtrrs++; |
| |
| top_of_ram = (uint32_t)cbmem_top(); |
| /* Cache 8MiB below the top of ram. The top of ram under 4GiB is the |
| * start of the TSEG region. It is required to be 8MiB aligned. Set |
| * this area as cacheable so it can be used later for ramstage before |
| * setting up the entire RAM as cacheable. */ |
| slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ |
| slot = stack_push(slot, ~((8 << 20) - 1) | MTRRphysMaskValid); |
| slot = stack_push(slot, 0); /* upper base */ |
| slot = stack_push(slot, (top_of_ram - (8 << 20)) | MTRR_TYPE_WRBACK); |
| num_mtrrs++; |
| |
| /* Cache 8MiB at the top of ram. Top of ram is where the TSEG |
| * region resides. However, it is not restricted to SMM mode until |
| * SMM has been relocated. By setting the region to cacheable it |
| * provides faster access when relocating the SMM handler as well |
| * as using the TSEG region for other purposes. */ |
| slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ |
| slot = stack_push(slot, ~((8 << 20) - 1) | MTRRphysMaskValid); |
| slot = stack_push(slot, 0); /* upper base */ |
| slot = stack_push(slot, top_of_ram | MTRR_TYPE_WRBACK); |
| num_mtrrs++; |
| |
| /* Save the number of MTRRs to setup. Return the stack location |
| * pointing to the number of MTRRs. */ |
| slot = stack_push(slot, num_mtrrs); |
| |
| return slot; |
| } |
| |
| void ramstage_cache_invalid(struct ramstage_cache *cache) |
| { |
| #if CONFIG_RESET_ON_INVALID_RAMSTAGE_CACHE |
| /* Perform cold reset on invalid ramstage cache. */ |
| cold_reset(); |
| #endif |
| } |