Broadwell uses a binary blob called the memory reference code (MRC) to start up its SDRAM. This is similar to ivybridge so we can mostly use common code for running this blob.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v2: - Rename sdram to mrc
arch/x86/cpu/broadwell/Makefile | 1 + arch/x86/cpu/broadwell/sdram.c | 307 +++++++++++++++++++++++++ arch/x86/include/asm/arch-broadwell/pei_data.h | 177 ++++++++++++++ arch/x86/include/asm/global_data.h | 24 ++ 4 files changed, 509 insertions(+) create mode 100644 arch/x86/cpu/broadwell/sdram.c create mode 100644 arch/x86/include/asm/arch-broadwell/pei_data.h
diff --git a/arch/x86/cpu/broadwell/Makefile b/arch/x86/cpu/broadwell/Makefile index 5a62afa..012798f 100644 --- a/arch/x86/cpu/broadwell/Makefile +++ b/arch/x86/cpu/broadwell/Makefile @@ -13,3 +13,4 @@ obj-y += pinctrl_broadwell.o obj-y += power_state.o obj-y += refcode.o obj-y += sata.o +obj-y += sdram.o diff --git a/arch/x86/cpu/broadwell/sdram.c b/arch/x86/cpu/broadwell/sdram.c new file mode 100644 index 0000000..4bf5d15 --- /dev/null +++ b/arch/x86/cpu/broadwell/sdram.c @@ -0,0 +1,307 @@ +/* + * Copyright (c) 2016 Google, Inc + * + * From coreboot src/soc/intel/broadwell/romstage/raminit.c + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <dm.h> +#include <pci.h> +#include <syscon.h> +#include <asm/cpu.h> +#include <asm/io.h> +#include <asm/lpc_common.h> +#include <asm/mrccache.h> +#include <asm/mrc_common.h> +#include <asm/mtrr.h> +#include <asm/pci.h> +#include <asm/arch/iomap.h> +#include <asm/arch/me.h> +#include <asm/arch/pch.h> +#include <asm/arch/pei_data.h> +#include <asm/arch/pm.h> + +ulong board_get_usable_ram_top(ulong total_size) +{ + return mrc_common_board_get_usable_ram_top(total_size); +} + +void dram_init_banksize(void) +{ + mrc_common_dram_init_banksize(); +} + +void broadwell_fill_pei_data(struct pei_data *pei_data) +{ + pei_data->pei_version = PEI_VERSION; + pei_data->board_type = BOARD_TYPE_ULT; + pei_data->pciexbar = MCFG_BASE_ADDRESS; + pei_data->smbusbar = SMBUS_BASE_ADDRESS; + pei_data->ehcibar = EARLY_EHCI_BAR; + pei_data->xhcibar = EARLY_XHCI_BAR; + pei_data->gttbar = EARLY_GTT_BAR; + pei_data->pmbase = ACPI_BASE_ADDRESS; + pei_data->gpiobase = GPIO_BASE_ADDRESS; + pei_data->tseg_size = CONFIG_SMM_TSEG_SIZE; + pei_data->temp_mmio_base = EARLY_TEMP_MMIO; + pei_data->tx_byte = sdram_console_tx_byte; + pei_data->ddr_refresh_2x = 1; +} + +static inline void pei_data_usb2_port(struct pei_data *pei_data, int port, + uint16_t length, uint8_t enable, + uint8_t oc_pin, uint8_t location) +{ + pei_data->usb2_ports[port].length = length; + pei_data->usb2_ports[port].enable = enable; + pei_data->usb2_ports[port].oc_pin = oc_pin; + pei_data->usb2_ports[port].location = location; +} + +static inline void pei_data_usb3_port(struct pei_data *pei_data, int port, + uint8_t enable, uint8_t oc_pin, + uint8_t fixed_eq) +{ + pei_data->usb3_ports[port].enable = enable; + pei_data->usb3_ports[port].oc_pin = oc_pin; + pei_data->usb3_ports[port].fixed_eq = fixed_eq; +} + +void mainboard_fill_pei_data(struct pei_data *pei_data) +{ + /* DQ byte map for Samus board */ + const u8 dq_map[2][6][2] = { + { { 0x0F, 0xF0 }, { 0x00, 0xF0 }, { 0x0F, 0xF0 }, + { 0x0F, 0x00 }, { 0xFF, 0x00 }, { 0xFF, 0x00 } }, + { { 0x0F, 0xF0 }, { 0x00, 0xF0 }, { 0x0F, 0xF0 }, + { 0x0F, 0x00 }, { 0xFF, 0x00 }, { 0xFF, 0x00 } } }; + /* DQS CPU<>DRAM map for Samus board */ + const u8 dqs_map[2][8] = { + { 2, 0, 1, 3, 6, 4, 7, 5 }, + { 2, 1, 0, 3, 6, 5, 4, 7 } }; + + pei_data->ec_present = 1; + + /* One installed DIMM per channel */ + pei_data->dimm_channel0_disabled = 2; + pei_data->dimm_channel1_disabled = 2; + + memcpy(pei_data->dq_map, dq_map, sizeof(dq_map)); + memcpy(pei_data->dqs_map, dqs_map, sizeof(dqs_map)); + + /* P0: HOST PORT */ + pei_data_usb2_port(pei_data, 0, 0x0080, 1, 0, + USB_PORT_BACK_PANEL); + /* P1: HOST PORT */ + pei_data_usb2_port(pei_data, 1, 0x0080, 1, 1, + USB_PORT_BACK_PANEL); + /* P2: RAIDEN */ + pei_data_usb2_port(pei_data, 2, 0x0080, 1, USB_OC_PIN_SKIP, + USB_PORT_BACK_PANEL); + /* P3: SD CARD */ + pei_data_usb2_port(pei_data, 3, 0x0040, 1, USB_OC_PIN_SKIP, + USB_PORT_INTERNAL); + /* P4: RAIDEN */ + pei_data_usb2_port(pei_data, 4, 0x0080, 1, USB_OC_PIN_SKIP, + USB_PORT_BACK_PANEL); + /* P5: WWAN (Disabled) */ + pei_data_usb2_port(pei_data, 5, 0x0000, 0, USB_OC_PIN_SKIP, + USB_PORT_SKIP); + /* P6: CAMERA */ + pei_data_usb2_port(pei_data, 6, 0x0040, 1, USB_OC_PIN_SKIP, + USB_PORT_INTERNAL); + /* P7: BT */ + pei_data_usb2_port(pei_data, 7, 0x0040, 1, USB_OC_PIN_SKIP, + USB_PORT_INTERNAL); + + /* P1: HOST PORT */ + pei_data_usb3_port(pei_data, 0, 1, 0, 0); + /* P2: HOST PORT */ + pei_data_usb3_port(pei_data, 1, 1, 1, 0); + /* P3: RAIDEN */ + pei_data_usb3_port(pei_data, 2, 1, USB_OC_PIN_SKIP, 0); + /* P4: RAIDEN */ + pei_data_usb3_port(pei_data, 3, 1, USB_OC_PIN_SKIP, 0); +} + +static unsigned long get_top_of_ram(struct udevice *dev) +{ + /* + * Base of DPR is top of usable DRAM below 4GiB. The register has + * 1 MiB alignment and reports the TOP of the range, the base + * must be calculated from the size in MiB in bits 11:4. + */ + u32 dpr, tom; + + dm_pci_read_config32(dev, DPR, &dpr); + tom = dpr & ~((1 << 20) - 1); + + debug("dpt %08x tom %08x\n", dpr, tom); + /* Subtract DMA Protected Range size if enabled */ + if (dpr & DPR_EPM) + tom -= (dpr & DPR_SIZE_MASK) << 16; + + return (unsigned long)tom; +} + +/** + * sdram_find() - Find available memory + * + * This is a bit complicated since on x86 there are system memory holes all + * over the place. We create a list of available memory blocks + * + * @dev: Northbridge device + */ +static int sdram_find(struct udevice *dev) +{ + struct memory_info *info = &gd->arch.meminfo; + ulong top_of_ram; + + top_of_ram = get_top_of_ram(dev); + mrc_add_memory_area(info, 0, top_of_ram); + + /* Add MTRRs for memory */ + mtrr_add_request(MTRR_TYPE_WRBACK, 0, 2ULL << 30); + + return 0; +} + +static int prepare_mrc_cache(struct pei_data *pei_data) +{ + struct mrc_data_container *mrc_cache; + struct mrc_region entry; + int ret; + + ret = mrccache_get_region(NULL, &entry); + if (ret) + return ret; + mrc_cache = mrccache_find_current(&entry); + if (!mrc_cache) + return -ENOENT; + + pei_data->saved_data = mrc_cache->data; + pei_data->saved_data_size = mrc_cache->data_size; + debug("%s: at %p, size %x checksum %04x\n", __func__, + pei_data->saved_data, pei_data->saved_data_size, + mrc_cache->checksum); + + return 0; +} + +int reserve_arch(void) +{ + return mrccache_reserve(); +} + +int dram_init(void) +{ + struct pei_data _pei_data __aligned(8); + struct pei_data *pei_data = &_pei_data; + struct udevice *dev, *me_dev, *pch_dev; + struct chipset_power_state ps; + const void *spd_data; + int ret, size; + + memset(pei_data, '\0', sizeof(struct pei_data)); + + /* Print ME state before MRC */ + ret = syscon_get_by_driver_data(X86_SYSCON_ME, &me_dev); + if (ret) + return ret; + intel_me_status(me_dev); + + /* Save ME HSIO version */ + ret = uclass_first_device(UCLASS_PCH, &pch_dev); + if (ret) + return ret; + if (!pch_dev) + return -ENODEV; + power_state_get(pch_dev, &ps); + + intel_me_hsio_version(me_dev, &ps.hsio_version, &ps.hsio_checksum); + + broadwell_fill_pei_data(pei_data); + mainboard_fill_pei_data(pei_data); + + ret = uclass_first_device(UCLASS_NORTHBRIDGE, &dev); + if (ret) + return ret; + if (!dev) + return -ENODEV; + size = 256; + ret = mrc_locate_spd(dev, size, &spd_data); + if (ret) + return ret; + memcpy(pei_data->spd_data[0][0], spd_data, size); + memcpy(pei_data->spd_data[1][0], spd_data, size); + + ret = prepare_mrc_cache(pei_data); + if (ret) + debug("prepare_mrc_cache failed: %d\n", ret); + + debug("PEI version %#x\n", pei_data->pei_version); + ret = mrc_common_init(dev, pei_data, true); + if (ret) + return ret; + debug("Memory init done\n"); + + ret = sdram_find(dev); + if (ret) + return ret; + gd->ram_size = gd->arch.meminfo.total_32bit_memory; + debug("RAM size %llx\n", (unsigned long long)gd->ram_size); + + debug("MRC output data length %#x at %p\n", pei_data->data_to_save_size, + pei_data->data_to_save); + /* S3 resume: don't save scrambler seed or MRC data */ + if (pei_data->boot_mode != SLEEP_STATE_S3) { + /* + * This will be copied to SDRAM in reserve_arch(), then written + * to SPI flash in mrccache_save() + */ + gd->arch.mrc_output = (char *)pei_data->data_to_save; + gd->arch.mrc_output_len = pei_data->data_to_save_size; + } + gd->arch.pei_meminfo = pei_data->meminfo; + + return 0; +} + +/* Use this hook to save our SDRAM parameters */ +int misc_init_r(void) +{ + int ret; + + ret = mrccache_save(); + if (ret) + printf("Unable to save MRC data: %d\n", ret); + else + debug("Saved MRC cache data\n"); + + return 0; +} + +void board_debug_uart_init(void) +{ + struct udevice *bus = NULL; + + /* com1 / com2 decode range */ + pci_x86_write_config(bus, PCH_DEV_LPC, LPC_IO_DEC, 1 << 4, PCI_SIZE_16); + + pci_x86_write_config(bus, PCH_DEV_LPC, LPC_EN, COMA_LPC_EN, + PCI_SIZE_16); +} + +static const struct udevice_id broadwell_syscon_ids[] = { + { .compatible = "intel,me", .data = X86_SYSCON_ME }, + { .compatible = "intel,gma", .data = X86_SYSCON_GMA }, + { } +}; + +U_BOOT_DRIVER(syscon_intel_me) = { + .name = "intel_me_syscon", + .id = UCLASS_SYSCON, + .of_match = broadwell_syscon_ids, +}; diff --git a/arch/x86/include/asm/arch-broadwell/pei_data.h b/arch/x86/include/asm/arch-broadwell/pei_data.h new file mode 100644 index 0000000..b2cc8b8 --- /dev/null +++ b/arch/x86/include/asm/arch-broadwell/pei_data.h @@ -0,0 +1,177 @@ +/* + * From Coreboot soc/intel/broadwell/include/soc/pei_data.h + * + * Copyright (C) 2014 Google Inc. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef ASM_ARCH_PEI_DATA_H +#define ASM_ARCH_PEI_DATA_H + +#include <linux/linkage.h> + +#define PEI_VERSION 22 + +typedef void asmlinkage (*tx_byte_func)(unsigned char byte); + +enum board_type { + BOARD_TYPE_CRB_MOBILE = 0, /* CRB Mobile */ + BOARD_TYPE_CRB_DESKTOP, /* CRB Desktop */ + BOARD_TYPE_USER1, /* SV mobile */ + BOARD_TYPE_USER2, /* SV desktop */ + BOARD_TYPE_USER3, /* SV server */ + BOARD_TYPE_ULT, /* ULT */ + BOARD_TYPE_CRB_EMBDEDDED, /* CRB Embedded */ + BOARD_TYPE_UNKNOWN, +}; + +#define MAX_USB2_PORTS 14 +#define MAX_USB3_PORTS 6 +#define USB_OC_PIN_SKIP 8 + +enum usb2_port_location { + USB_PORT_BACK_PANEL = 0, + USB_PORT_FRONT_PANEL, + USB_PORT_DOCK, + USB_PORT_MINI_PCIE, + USB_PORT_FLEX, + USB_PORT_INTERNAL, + USB_PORT_SKIP, + USB_PORT_NGFF_DEVICE_DOWN, +}; + +struct usb2_port_setting { + /* + * Usb Port Length: + * [16:4] = length in inches in octal format + * [3:0] = decimal point + */ + uint16_t length; + uint8_t enable; + uint8_t oc_pin; + uint8_t location; +} __packed; + +struct usb3_port_setting { + uint8_t enable; + uint8_t oc_pin; + /* + * Set to 0 if trace length is > 5 inches + * Set to 1 if trace length is <= 5 inches + */ + uint8_t fixed_eq; +} __packed; + + +struct pei_data { + uint32_t pei_version; + + enum board_type board_type; + int boot_mode; + int ec_present; + int usbdebug; + + /* Base addresses */ + uint32_t pciexbar; + uint16_t smbusbar; + uint32_t xhcibar; + uint32_t ehcibar; + uint32_t gttbar; + uint32_t rcba; + uint32_t pmbase; + uint32_t gpiobase; + uint32_t temp_mmio_base; + uint32_t tseg_size; + + /* + * 0 = leave channel enabled + * 1 = disable dimm 0 on channel + * 2 = disable dimm 1 on channel + * 3 = disable dimm 0+1 on channel + */ + int dimm_channel0_disabled; + int dimm_channel1_disabled; + /* Set to 0 for memory down */ + uint8_t spd_addresses[4]; + /* Enable 2x Refresh Mode */ + int ddr_refresh_2x; + /* DQ pins are interleaved on board */ + int dq_pins_interleaved; + /* Limit DDR3 frequency */ + int max_ddr3_freq; + /* Disable self refresh */ + int disable_self_refresh; + /* Disable cmd power/CKEPD */ + int disable_cmd_pwr; + + /* USB port configuration */ + struct usb2_port_setting usb2_ports[MAX_USB2_PORTS]; + struct usb3_port_setting usb3_ports[MAX_USB3_PORTS]; + + /* + * USB3 board specific PHY tuning + */ + + /* Valid range: 0x69 - 0x80 */ + uint8_t usb3_txout_volt_dn_amp_adj[MAX_USB3_PORTS]; + /* Valid range: 0x80 - 0x9c */ + uint8_t usb3_txout_imp_sc_volt_amp_adj[MAX_USB3_PORTS]; + /* Valid range: 0x39 - 0x80 */ + uint8_t usb3_txout_de_emp_adj[MAX_USB3_PORTS]; + /* Valid range: 0x3d - 0x4a */ + uint8_t usb3_txout_imp_adj_volt_amp[MAX_USB3_PORTS]; + + /* Console output function */ + tx_byte_func tx_byte; + + /* + * DIMM SPD data for memory down configurations + * [CHANNEL][SLOT][SPD] + */ + uint8_t spd_data[2][2][512]; + + /* + * LPDDR3 DQ byte map + * [CHANNEL][ITERATION][2] + * + * Maps which PI clocks are used by what LPDDR DQ Bytes (from CPU side) + * DQByteMap[0] - ClkDQByteMap: + * - If clock is per rank, program to [0xFF, 0xFF] + * - If clock is shared by 2 ranks, program to [0xFF, 0] or [0, 0xFF] + * - If clock is shared by 2 ranks but does not go to all bytes, + * Entry[i] defines which DQ bytes Group i services + * DQByteMap[1] - CmdNDQByteMap: [0] is CmdN/CAA and [1] is CmdN/CAB + * DQByteMap[2] - CmdSDQByteMap: [0] is CmdS/CAA and [1] is CmdS/CAB + * DQByteMap[3] - CkeDQByteMap : [0] is CKE /CAA and [1] is CKE /CAB + * For DDR, DQByteMap[3:1] = [0xFF, 0] + * DQByteMap[4] - CtlDQByteMap : Always program to [0xFF, 0] + * since we have 1 CTL / rank + * DQByteMap[5] - CmdVDQByteMap: Always program to [0xFF, 0] + * since we have 1 CA Vref + */ + uint8_t dq_map[2][6][2]; + + /* + * LPDDR3 Map from CPU DQS pins to SDRAM DQS pins + * [CHANNEL][MAX_BYTES] + */ + uint8_t dqs_map[2][8]; + + /* Data read from flash and passed into MRC */ + const void *saved_data; + int saved_data_size; + + /* Disable use of saved data (can be set by mainboard) */ + int disable_saved_data; + + /* Data from MRC that should be saved to flash */ + void *data_to_save; + int data_to_save_size; + struct pei_memory_info meminfo; +} __packed; + +void mainboard_fill_pei_data(struct pei_data *pei_data); +void broadwell_fill_pei_data(struct pei_data *pei_data); + +#endif diff --git a/arch/x86/include/asm/global_data.h b/arch/x86/include/asm/global_data.h index 0ca518c..3bc2ac2 100644 --- a/arch/x86/include/asm/global_data.h +++ b/arch/x86/include/asm/global_data.h @@ -19,6 +19,29 @@ enum pei_boot_mode_t {
};
+struct dimm_info { + uint32_t dimm_size; + uint16_t ddr_type; + uint16_t ddr_frequency; + uint8_t rank_per_dimm; + uint8_t channel_num; + uint8_t dimm_num; + uint8_t bank_locator; + /* The 5th byte is '\0' for the end of string */ + uint8_t serial[5]; + /* The 19th byte is '\0' for the end of string */ + uint8_t module_part_number[19]; + uint16_t mod_id; + uint8_t mod_type; + uint8_t bus_width; +} __packed; + +struct pei_memory_info { + uint8_t dimm_cnt; + /* Maximum num of dimm is 8 */ + struct dimm_info dimm[8]; +} __packed; + struct memory_area { uint64_t start; uint64_t size; @@ -59,6 +82,7 @@ struct arch_global_data { enum pei_boot_mode_t pei_boot_mode; const struct pch_gpio_map *gpio_map; /* board GPIO map */ struct memory_info meminfo; /* Memory information */ + struct pei_memory_info pei_meminfo; /* PEI memory information */ #ifdef CONFIG_HAVE_FSP void *hob_list; /* FSP HOB list */ #endif