diff options
Diffstat (limited to 'src/soc/intel/baytrail/romstage')
| -rw-r--r-- | src/soc/intel/baytrail/romstage/Makefile.inc | 4 | ||||
| -rw-r--r-- | src/soc/intel/baytrail/romstage/cache_as_ram.inc | 280 | ||||
| -rw-r--r-- | src/soc/intel/baytrail/romstage/raminit.c | 93 | ||||
| -rw-r--r-- | src/soc/intel/baytrail/romstage/romstage.c | 218 | ||||
| -rw-r--r-- | src/soc/intel/baytrail/romstage/uart.c | 39 |
5 files changed, 634 insertions, 0 deletions
diff --git a/src/soc/intel/baytrail/romstage/Makefile.inc b/src/soc/intel/baytrail/romstage/Makefile.inc new file mode 100644 index 0000000000..188ce44ecd --- /dev/null +++ b/src/soc/intel/baytrail/romstage/Makefile.inc @@ -0,0 +1,4 @@ +cpu_incs += $(src)/soc/intel/baytrail/romstage/cache_as_ram.inc +romstage-y += romstage.c +romstage-y += raminit.c +romstage-$(CONFIG_ENABLE_BUILTIN_COM1) += uart.c diff --git a/src/soc/intel/baytrail/romstage/cache_as_ram.inc b/src/soc/intel/baytrail/romstage/cache_as_ram.inc new file mode 100644 index 0000000000..920fbe4b09 --- /dev/null +++ b/src/soc/intel/baytrail/romstage/cache_as_ram.inc @@ -0,0 +1,280 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com> + * Copyright (C) 2007-2008 coresystems GmbH + * + * 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 <cpu/x86/stack.h> +#include <cpu/x86/mtrr.h> +#include <cpu/x86/cache.h> +#include <cpu/x86/post_code.h> +#include <cbmem.h> + +/* The full cache-as-ram size includes the cache-as-ram portion from coreboot + * and the space used by the reference code. These 2 values combined should + * be a power of 2 because the MTRR setup assumes that. */ +#define CACHE_AS_RAM_SIZE \ + (CONFIG_DCACHE_RAM_SIZE + CONFIG_DCACHE_RAM_MRC_VAR_SIZE) +#define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE + +/* Enough room to cache CAR_TILE_SIZE starting at MRC_BIN_ADDRESS */ +#define CACHE_MRC_BASE (CONFIG_MRC_BIN_ADDRESS) +#define CACHE_MRC_MASK (~(CONFIG_CAR_TILE_SIZE - 1)) + +#define CPU_PHYSMASK_HI ((1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1) + +#define NoEvictMod_MSR 0x2e0 +#define BBL_CR_CTL3_MSR 0x11e +#define MCG_CAP_MSR 0x179 + + /* Save the BIST result. */ + movl %eax, %ebp + +cache_as_ram: + post_code(0x20) + + /* Send INIT IPI to all excluding ourself. */ + movl $0x000C4500, %eax + movl $0xFEE00300, %esi + movl %eax, (%esi) + + /* All CPUs need to be in Wait for SIPI state */ +wait_for_sipi: + movl (%esi), %eax + bt $12, %eax + jc wait_for_sipi + + post_code(0x21) + /* Configure the default memory type to uncacheable as well as disable + * fixed and variable range mtrrs. */ + movl $MTRRdefType_MSR, %ecx + rdmsr + andl $(~0x00000cff), %eax + wrmsr + + post_code(0x22) + /* Zero the variable MTRRs. */ + movl $MCG_CAP_MSR, %ecx + rdmsr + movzx %al, %ebx + /* First variable MTRR. */ + movl $0x200, %ecx + xorl %eax, %eax + xorl %edx, %edx + 1: + wrmsr + inc %ecx + dec %ebx + jnz 1b + + /* Zero out all fixed range and variable range MTRRs. */ + movl $fixed_mtrr_table, %esi + movl $((fixed_mtrr_table_end - fixed_mtrr_table) / 2), %edi + xorl %eax, %eax + xorl %edx, %edx + 1: + movw (%esi), %bx + movzx %bx, %ecx + wrmsr + add $2, %esi + dec %edi + jnz 1b + + post_code(0x23) + /* Set Cache-as-RAM base address. */ + movl $(MTRRphysBase_MSR(0)), %ecx + movl $(CACHE_AS_RAM_BASE | MTRR_TYPE_WRBACK), %eax + xorl %edx, %edx + wrmsr + + post_code(0x24) + /* Set Cache-as-RAM mask. */ + movl $(MTRRphysMask_MSR(0)), %ecx + movl $(~(CACHE_AS_RAM_SIZE - 1) | MTRRphysMaskValid), %eax + movl $CPU_PHYSMASK_HI, %edx + wrmsr + + post_code(0x25) + /* Set Cache-as-RAM base address. */ + movl $(MTRRphysBase_MSR(1)), %ecx + movl $(CACHE_MRC_BASE | MTRR_TYPE_WRPROT), %eax + xorl %edx, %edx + wrmsr + + movl $(MTRRphysMask_MSR(1)), %ecx + movl $(CACHE_MRC_MASK | MTRRphysMaskValid), %eax + movl $CPU_PHYSMASK_HI, %edx + wrmsr + + /* Enable MTRR. */ + movl $MTRRdefType_MSR, %ecx + rdmsr + orl $MTRRdefTypeEn, %eax + wrmsr + + post_code(0x26) + + /* Enable the L2 cache. */ + movl $BBL_CR_CTL3_MSR, %ecx + rdmsr + orl $0x100, %eax + wrmsr + + post_code(0x27) + + /* Enable cache (CR0.CD = 0, CR0.NW = 0). */ + movl %cr0, %eax + andl $(~(CR0_CacheDisable | CR0_NoWriteThrough)), %eax + invd + movl %eax, %cr0 + + /* enable the 'no eviction' mode */ + movl $NoEvictMod_MSR, %ecx + rdmsr + orl $1, %eax + wrmsr + + post_code(0x28) + + /* Clear the cache memory region. This will also fill up the cache */ + movl $CACHE_AS_RAM_BASE, %esi + movl %esi, %edi + movl $(CACHE_AS_RAM_SIZE / 4), %ecx + xorl %eax, %eax + rep stosl + + /* enable no evict mode */ + movl $NoEvictMod_MSR, %ecx + rdmsr + orl $2, %eax + wrmsr + + post_code(0x29) + + /* Setup the stack. */ + movl $(CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE), %eax + movl %eax, %esp + + /* Restore the BIST result. */ + movl %ebp, %eax + movl %esp, %ebp + pushl %eax + +before_romstage: + post_code(0x2a) + /* Call romstage.c main function. */ + call romstage_main + /* Save return value from romstage_main. It contains the stack to use + * after cache-as-ram is torn down. It also contains the information + * for setting up MTRRs. */ + movl %eax, %ebx + + post_code(0x2b) + + /* Disable cache. */ + movl %cr0, %eax + orl $CR0_CacheDisable, %eax + movl %eax, %cr0 + + post_code(0x2c) + + /* Disable MTRR. */ + movl $MTRRdefType_MSR, %ecx + rdmsr + andl $(~MTRRdefTypeEn), %eax + wrmsr + + invd + + post_code(0x2d) + + /* Disable the no eviction run state */ + movl $NoEvictMod_MSR, %ecx + rdmsr + andl $~2, %eax + wrmsr + + /* Disable the no eviction mode */ + rdmsr + andl $~1, %eax + wrmsr + + post_code(0x2e) + + /* Setup stack as indicated by return value from ramstage_main(). */ + movl %ebx, %esp + + /* Get number of MTRRs. */ + popl %ebx + movl $MTRRphysBase_MSR(0), %ecx +1: + testl %ebx, %ebx + jz 1f + + /* Low 32 bits of MTRR base. */ + popl %eax + /* Upper 32 bits of MTRR base. */ + popl %edx + /* Write MTRR base. */ + wrmsr + inc %ecx + /* Low 32 bits of MTRR mask. */ + popl %eax + /* Upper 32 bits of MTRR mask. */ + popl %edx + /* Write MTRR mask. */ + wrmsr + inc %ecx + + dec %ebx + jmp 1b +1: + post_code(0x2f) + + /* And enable cache again after setting MTRRs. */ + movl %cr0, %eax + andl $~(CR0_CacheDisable | CR0_NoWriteThrough), %eax + movl %eax, %cr0 + + post_code(0x30) + + /* Enable MTRR. */ + movl $MTRRdefType_MSR, %ecx + rdmsr + orl $MTRRdefTypeEn, %eax + wrmsr + + post_code(0x31) + +__main: + post_code(POST_PREPARE_RAMSTAGE) + cld /* Clear direction flag. */ + call romstage_after_car + +.Lhlt: + post_code(POST_DEAD_CODE) + hlt + jmp .Lhlt + +/* Fixed MTRRs */ +fixed_mtrr_table: + .word 0x250, 0x258, 0x259 + .word 0x268, 0x269, 0x26A + .word 0x26B, 0x26C, 0x26D + .word 0x26E, 0x26F +fixed_mtrr_table_end: + diff --git a/src/soc/intel/baytrail/romstage/raminit.c b/src/soc/intel/baytrail/romstage/raminit.c new file mode 100644 index 0000000000..68836d3ada --- /dev/null +++ b/src/soc/intel/baytrail/romstage/raminit.c @@ -0,0 +1,93 @@ +/* + * 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/io.h> +#include <cbfs.h> +#include <cbmem.h> +#include <console/console.h> +#include <device/pci_def.h> +#include <baytrail/gpio.h> +#include <baytrail/mrc_cache.h> +#include <baytrail/iomap.h> +#include <baytrail/pci_devs.h> +#include <baytrail/romstage.h> + + +static void enable_smbus(void) +{ + uint32_t reg; + const uint32_t smbus_dev = PCI_DEV(0, SMBUS_DEV, SMBUS_FUNC); + + /* SMBus I/O BAR */ + reg = SMBUS_BASE_ADDRESS | 2; + pci_write_config32(smbus_dev, PCI_BASE_ADDRESS_4, reg); + /* Enable decode of I/O space. */ + reg = pci_read_config16(smbus_dev, PCI_COMMAND); + reg |= 0x1; + pci_write_config16(smbus_dev, PCI_COMMAND, reg); + /* Enable Host Controller */ + reg = pci_read_config8(smbus_dev, 0x40); + reg |= 1; + pci_write_config8(smbus_dev, 0x40, reg); + + /* Configure pads to be used for SMBus */ + score_select_func(PCU_SMB_CLK_PAD, 1); + score_select_func(PCU_SMB_DATA_PAD, 1); +} + +void raminit(struct mrc_params *mp, int prev_sleep_state) +{ + int ret; + mrc_wrapper_entry_t mrc_entry; + const struct mrc_saved_data *cache; + + /* Fill in default entries. */ + mp->version = MRC_PARAMS_VER; + mp->console_out = &console_tx_byte; + mp->prev_sleep_state = prev_sleep_state; + + if (!mrc_cache_get_current(&cache)) { + mp->saved_data_size = cache->size; + mp->saved_data = &cache->data[0]; + } else { + printk(BIOS_DEBUG, "No MRC cache found.\n"); + } + + mrc_entry = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, "mrc.bin", 0xab, + NULL); + + if (mrc_entry == NULL) { + printk(BIOS_DEBUG, "Couldn't find mrc.bin\n"); + return; + } + if (mp->mainboard.dram_info_location == DRAM_INFO_SPD_SMBUS) + enable_smbus(); + + ret = mrc_entry(mp); + + cbmem_initialize_empty(); + + printk(BIOS_DEBUG, "MRC Wrapper returned %d\n", ret); + printk(BIOS_DEBUG, "MRC data at %p %d bytes\n", mp->data_to_save, + mp->data_to_save_size); + + if (mp->data_to_save != NULL && mp->data_to_save_size > 0) + mrc_cache_stash_data(mp->data_to_save, mp->data_to_save_size); +} diff --git a/src/soc/intel/baytrail/romstage/romstage.c b/src/soc/intel/baytrail/romstage/romstage.c new file mode 100644 index 0000000000..d3538991bb --- /dev/null +++ b/src/soc/intel/baytrail/romstage/romstage.c @@ -0,0 +1,218 @@ +/* + * 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 <console/console.h> +#include <cbmem.h> +#include <cpu/x86/mtrr.h> +#include <romstage_handoff.h> +#include <baytrail/gpio.h> +#include <baytrail/iomap.h> +#include <baytrail/iosf.h> +#include <baytrail/lpc.h> +#include <baytrail/pci_devs.h> +#include <baytrail/romstage.h> + +/* 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 = 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); +} + +/* Entry from cache-as-ram.inc. */ +void * asmlinkage romstage_main(unsigned long bist) +{ + /* Call into mainboard. */ + mainboard_romstage_entry(bist); + + return setup_stack_and_mttrs(); +} + +/* Entry from the mainboard. */ +void romstage_common(const struct romstage_params *params) +{ + struct romstage_handoff *handoff; + + program_base_addresses(); + + byt_config_com1_and_enable(); + + console_init(); + + /* Initialize RAM */ + raminit(params->mrc_params, 5); + + handoff = romstage_handoff_find_or_add(); + if (handoff != NULL) + handoff->s3_resume = 0; + else + printk(BIOS_DEBUG, "Romstage handoff structure not added!\n"); + +} + +static void open_up_spi(void) +{ + const uintptr_t sbase = SPI_BASE_ADDRESS; + + /* Disable generating SMI when setting WPD bit. */ + write32(sbase + 0xf8, read32(sbase + 0xf8) & ~(1 << 7)); + /* Disable the SMM-only BIOS write and set WPD bit. */ + write32(sbase + 0xfc, 1 | (read32(sbase + 0xfc) & ~(1 << 5))); +} + +void asmlinkage romstage_after_car(void) +{ + /* Allow BIOS to program SPI part. */ + open_up_spi(); + + /* 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; +} diff --git a/src/soc/intel/baytrail/romstage/uart.c b/src/soc/intel/baytrail/romstage/uart.c new file mode 100644 index 0000000000..dee3be95c3 --- /dev/null +++ b/src/soc/intel/baytrail/romstage/uart.c @@ -0,0 +1,39 @@ +/* + * 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 <arch/io.h> +#include <baytrail/gpio.h> +#include <baytrail/iomap.h> +#include <baytrail/lpc.h> +#include <baytrail/pci_devs.h> +#include <baytrail/romstage.h> + +void byt_config_com1_and_enable(void) +{ + uint32_t reg; + + /* Enable the UART hardware for COM1. */ + reg = 1; + pci_write_config32(PCI_DEV(0, LPC_DEV, 0), UART_CONT, reg); + + /* Set up the pads to select the UART function. RXD and TXD are + * 0x520 and 0x530, respectively. */ + write32(IO_BASE_ADDRESS + 0x520, read32(IO_BASE_ADDRESS + 0x520) | 1); + write32(IO_BASE_ADDRESS + 0x530, read32(IO_BASE_ADDRESS + 0x530) | 1); +} |