From 877f5d6aeb6a1a62f09c95cc214c874d057310d6 Mon Sep 17 00:00:00 2001 From: Leah Rowe Date: Sat, 10 Aug 2024 14:43:19 +0100 Subject: coreboot/default: merge coreboot/haswell Signed-off-by: Leah Rowe --- .../patches/0043-haswell-NRI-Initialise-MPLL.patch | 348 +++++++++++++++++++++ 1 file changed, 348 insertions(+) create mode 100644 config/coreboot/default/patches/0043-haswell-NRI-Initialise-MPLL.patch (limited to 'config/coreboot/default/patches/0043-haswell-NRI-Initialise-MPLL.patch') diff --git a/config/coreboot/default/patches/0043-haswell-NRI-Initialise-MPLL.patch b/config/coreboot/default/patches/0043-haswell-NRI-Initialise-MPLL.patch new file mode 100644 index 00000000..9b733998 --- /dev/null +++ b/config/coreboot/default/patches/0043-haswell-NRI-Initialise-MPLL.patch @@ -0,0 +1,348 @@ +From 8b584165a99c69cc808f86efcdd55acb06a4464c Mon Sep 17 00:00:00 2001 +From: Angel Pons +Date: Thu, 11 Apr 2024 17:25:07 +0200 +Subject: [PATCH 01/17] haswell NRI: Initialise MPLL + +Add code to initialise the MPLL (Memory PLL). The procedure is similar +to the one for Sandy/Ivy Bridge, but it is not worth factoring out. + +Change-Id: I978c352de68f6d8cecc76f4ae3c12daaf4be9ed6 +Signed-off-by: Angel Pons +--- + .../intel/haswell/native_raminit/Makefile.mk | 2 + + .../intel/haswell/native_raminit/init_mpll.c | 210 ++++++++++++++++++ + .../haswell/native_raminit/io_comp_control.c | 22 ++ + .../haswell/native_raminit/raminit_main.c | 3 +- + .../haswell/native_raminit/raminit_native.h | 11 + + .../intel/haswell/registers/mchbar.h | 3 + + 6 files changed, 250 insertions(+), 1 deletion(-) + create mode 100644 src/northbridge/intel/haswell/native_raminit/init_mpll.c + create mode 100644 src/northbridge/intel/haswell/native_raminit/io_comp_control.c + +diff --git a/src/northbridge/intel/haswell/native_raminit/Makefile.mk b/src/northbridge/intel/haswell/native_raminit/Makefile.mk +index ebf7abc6ec..c125d84f0b 100644 +--- a/src/northbridge/intel/haswell/native_raminit/Makefile.mk ++++ b/src/northbridge/intel/haswell/native_raminit/Makefile.mk +@@ -1,5 +1,7 @@ + ## SPDX-License-Identifier: GPL-2.0-or-later + ++romstage-y += init_mpll.c ++romstage-y += io_comp_control.c + romstage-y += raminit_main.c + romstage-y += raminit_native.c + romstage-y += spd_bitmunching.c +diff --git a/src/northbridge/intel/haswell/native_raminit/init_mpll.c b/src/northbridge/intel/haswell/native_raminit/init_mpll.c +new file mode 100644 +index 0000000000..1f3f2c29a9 +--- /dev/null ++++ b/src/northbridge/intel/haswell/native_raminit/init_mpll.c +@@ -0,0 +1,210 @@ ++/* SPDX-License-Identifier: GPL-2.0-or-later */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#include "raminit_native.h" ++ ++static uint32_t get_mem_multiplier(const struct sysinfo *ctrl) ++{ ++ const uint32_t mult = NS2MHZ_DIV256 / (ctrl->tCK * ctrl->base_freq); ++ ++ if (ctrl->base_freq == 100) ++ return clamp_u32(7, mult, 12); ++ ++ if (ctrl->base_freq == 133) ++ return clamp_u32(3, mult, 10); ++ ++ die("Unsupported base frequency\n"); ++} ++ ++static void normalize_tck(struct sysinfo *ctrl, const bool pll_ref100) ++{ ++ /** TODO: Haswell supports up to DDR3-2600 **/ ++ if (ctrl->tCK <= TCK_1200MHZ) { ++ ctrl->tCK = TCK_1200MHZ; ++ ctrl->base_freq = 133; ++ ctrl->mem_clock_mhz = 1200; ++ ++ } else if (ctrl->tCK <= TCK_1100MHZ) { ++ ctrl->tCK = TCK_1100MHZ; ++ ctrl->base_freq = 100; ++ ctrl->mem_clock_mhz = 1100; ++ ++ } else if (ctrl->tCK <= TCK_1066MHZ) { ++ ctrl->tCK = TCK_1066MHZ; ++ ctrl->base_freq = 133; ++ ctrl->mem_clock_mhz = 1066; ++ ++ } else if (ctrl->tCK <= TCK_1000MHZ) { ++ ctrl->tCK = TCK_1000MHZ; ++ ctrl->base_freq = 100; ++ ctrl->mem_clock_mhz = 1000; ++ ++ } else if (ctrl->tCK <= TCK_933MHZ) { ++ ctrl->tCK = TCK_933MHZ; ++ ctrl->base_freq = 133; ++ ctrl->mem_clock_mhz = 933; ++ ++ } else if (ctrl->tCK <= TCK_900MHZ) { ++ ctrl->tCK = TCK_900MHZ; ++ ctrl->base_freq = 100; ++ ctrl->mem_clock_mhz = 900; ++ ++ } else if (ctrl->tCK <= TCK_800MHZ) { ++ ctrl->tCK = TCK_800MHZ; ++ ctrl->base_freq = 133; ++ ctrl->mem_clock_mhz = 800; ++ ++ } else if (ctrl->tCK <= TCK_700MHZ) { ++ ctrl->tCK = TCK_700MHZ; ++ ctrl->base_freq = 100; ++ ctrl->mem_clock_mhz = 700; ++ ++ } else if (ctrl->tCK <= TCK_666MHZ) { ++ ctrl->tCK = TCK_666MHZ; ++ ctrl->base_freq = 133; ++ ctrl->mem_clock_mhz = 666; ++ ++ } else if (ctrl->tCK <= TCK_533MHZ) { ++ ctrl->tCK = TCK_533MHZ; ++ ctrl->base_freq = 133; ++ ctrl->mem_clock_mhz = 533; ++ ++ } else if (ctrl->tCK <= TCK_400MHZ) { ++ ctrl->tCK = TCK_400MHZ; ++ ctrl->base_freq = 133; ++ ctrl->mem_clock_mhz = 400; ++ ++ } else { ++ ctrl->tCK = 0; ++ ctrl->base_freq = 1; ++ ctrl->mem_clock_mhz = 0; ++ return; ++ } ++ if (!pll_ref100 && ctrl->base_freq == 100) { ++ /* Skip unsupported frequency */ ++ ctrl->tCK++; ++ normalize_tck(ctrl, pll_ref100); ++ } ++} ++ ++#define MIN_CAS 4 ++#define MAX_CAS 24 ++ ++static uint8_t find_compatible_cas(struct sysinfo *ctrl) ++{ ++ printk(RAM_DEBUG, "With tCK %u, try CAS: ", ctrl->tCK); ++ const uint8_t cas_lower = MAX(MIN_CAS, DIV_ROUND_UP(ctrl->tAA, ctrl->tCK)); ++ const uint8_t cas_upper = MIN(MAX_CAS, 19); /* JEDEC MR0 limit */ ++ ++ if (!(ctrl->cas_supported >> (cas_lower - MIN_CAS))) { ++ printk(RAM_DEBUG, "DIMMs do not support CAS >= %u\n", cas_lower); ++ ctrl->tCK++; ++ return 0; ++ } ++ for (uint8_t cas = cas_lower; cas <= cas_upper; cas++) { ++ printk(RAM_DEBUG, "%u ", cas); ++ if (ctrl->cas_supported & BIT(cas - MIN_CAS)) { ++ printk(RAM_DEBUG, "OK\n"); ++ return cas; ++ } ++ } ++ return 0; ++} ++ ++static enum raminit_status find_cas_tck(struct sysinfo *ctrl) ++{ ++ /** TODO: Honor all possible PLL_REF100_CFG values **/ ++ uint8_t pll_ref100 = (pci_read_config32(HOST_BRIDGE, CAPID0_B) >> 21) & 0x7; ++ printk(RAM_DEBUG, "PLL_REF100_CFG value: 0x%x\n", pll_ref100); ++ printk(RAM_DEBUG, "100MHz reference clock support: %s\n", pll_ref100 ? "yes" : "no"); ++ ++ uint8_t selected_cas; ++ while (true) { ++ /* Round tCK up so that it is a multiple of either 133 or 100 MHz */ ++ normalize_tck(ctrl, pll_ref100); ++ if (!ctrl->tCK) { ++ printk(BIOS_ERR, "Couldn't find compatible clock / CAS settings\n"); ++ return RAMINIT_STATUS_MPLL_INIT_FAILURE; ++ } ++ selected_cas = find_compatible_cas(ctrl); ++ if (selected_cas) ++ break; ++ ++ ctrl->tCK++; ++ } ++ printk(BIOS_DEBUG, "Found compatible clock / CAS settings\n"); ++ printk(BIOS_DEBUG, "Selected DRAM frequency: %u MHz\n", NS2MHZ_DIV256 / ctrl->tCK); ++ printk(BIOS_DEBUG, "Selected CAS latency : %uT\n", selected_cas); ++ ctrl->multiplier = get_mem_multiplier(ctrl); ++ return RAMINIT_STATUS_SUCCESS; ++} ++ ++enum raminit_status initialise_mpll(struct sysinfo *ctrl) ++{ ++ if (ctrl->tCK > TCK_400MHZ) { ++ printk(BIOS_ERR, "tCK is too slow. Increasing to 400 MHz as last resort\n"); ++ ctrl->tCK = TCK_400MHZ; ++ } ++ while (true) { ++ if (!ctrl->qclkps) { ++ const enum raminit_status status = find_cas_tck(ctrl); ++ if (status) ++ return status; ++ } ++ ++ /* ++ * Unlike previous generations, Haswell's MPLL won't shut down if the ++ * requested frequency isn't supported. But we cannot reinitialize it. ++ * Another different thing: MPLL registers are 4-bit instead of 8-bit. ++ */ ++ ++ /** FIXME: Obtain current clock frequency if we want to skip this **/ ++ //if (mchbar_read32(MC_BIOS_DATA) != 0) ++ // break; ++ ++ uint32_t mc_bios_req = ctrl->multiplier; ++ if (ctrl->base_freq == 100) { ++ /* Use 100 MHz reference clock */ ++ mc_bios_req |= BIT(4); ++ } ++ mc_bios_req |= BIT(31); ++ printk(RAM_DEBUG, "MC_BIOS_REQ = 0x%08x\n", mc_bios_req); ++ printk(BIOS_DEBUG, "MPLL busy... "); ++ mchbar_write32(MC_BIOS_REQ, mc_bios_req); ++ ++ for (unsigned int i = 0; i <= 5000; i++) { ++ if (!(mchbar_read32(MC_BIOS_REQ) & BIT(31))) { ++ printk(BIOS_DEBUG, "done in %u us\n", i); ++ break; ++ } ++ udelay(1); ++ } ++ if (mchbar_read32(MC_BIOS_REQ) & BIT(31)) ++ printk(BIOS_DEBUG, "did not lock\n"); ++ ++ /* Verify locked frequency */ ++ const uint32_t mc_bios_data = mchbar_read32(MC_BIOS_DATA); ++ printk(RAM_DEBUG, "MC_BIOS_DATA = 0x%08x\n", mc_bios_data); ++ if ((mc_bios_data & 0xf) >= ctrl->multiplier) ++ break; ++ ++ printk(BIOS_DEBUG, "Retrying at a lower frequency\n\n"); ++ ctrl->tCK++; ++ } ++ if (!ctrl->mem_clock_mhz) { ++ printk(BIOS_ERR, "Could not program MPLL frequency\n"); ++ return RAMINIT_STATUS_MPLL_INIT_FAILURE; ++ } ++ printk(BIOS_DEBUG, "MPLL frequency is set to: %u MHz ", ctrl->mem_clock_mhz); ++ ctrl->mem_clock_fs = 1000000000 / ctrl->mem_clock_mhz; ++ printk(BIOS_DEBUG, "(period: %u femtoseconds)\n", ctrl->mem_clock_fs); ++ ctrl->qclkps = ctrl->mem_clock_fs / 2000; ++ printk(BIOS_DEBUG, "Quadrature clock period: %u picoseconds\n", ctrl->qclkps); ++ return wait_for_first_rcomp(); ++} +diff --git a/src/northbridge/intel/haswell/native_raminit/io_comp_control.c b/src/northbridge/intel/haswell/native_raminit/io_comp_control.c +new file mode 100644 +index 0000000000..d45b608dd3 +--- /dev/null ++++ b/src/northbridge/intel/haswell/native_raminit/io_comp_control.c +@@ -0,0 +1,22 @@ ++/* SPDX-License-Identifier: GPL-2.0-or-later */ ++ ++#include ++#include ++#include ++#include ++#include ++ ++#include "raminit_native.h" ++ ++enum raminit_status wait_for_first_rcomp(void) ++{ ++ struct stopwatch timer; ++ stopwatch_init_msecs_expire(&timer, 2000); ++ do { ++ if (mchbar_read32(RCOMP_TIMER) & BIT(16)) ++ return RAMINIT_STATUS_SUCCESS; ++ ++ } while (!stopwatch_expired(&timer)); ++ printk(BIOS_ERR, "Timed out waiting for RCOMP to complete\n"); ++ return RAMINIT_STATUS_POLL_TIMEOUT; ++} +diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_main.c b/src/northbridge/intel/haswell/native_raminit/raminit_main.c +index 19ec5859ac..bf745e943f 100644 +--- a/src/northbridge/intel/haswell/native_raminit/raminit_main.c ++++ b/src/northbridge/intel/haswell/native_raminit/raminit_main.c +@@ -19,7 +19,8 @@ struct task_entry { + }; + + static const struct task_entry cold_boot[] = { +- { collect_spd_info, true, "PROCSPD", }, ++ { collect_spd_info, true, "PROCSPD", }, ++ { initialise_mpll, true, "INITMPLL", }, + }; + + /* Return a generic stepping value to make stepping checks simpler */ +diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_native.h b/src/northbridge/intel/haswell/native_raminit/raminit_native.h +index 8078c9c386..15a1550424 100644 +--- a/src/northbridge/intel/haswell/native_raminit/raminit_native.h ++++ b/src/northbridge/intel/haswell/native_raminit/raminit_native.h +@@ -24,6 +24,8 @@ enum raminit_status { + RAMINIT_STATUS_SUCCESS = 0, + RAMINIT_STATUS_NO_MEMORY_INSTALLED, + RAMINIT_STATUS_UNSUPPORTED_MEMORY, ++ RAMINIT_STATUS_MPLL_INIT_FAILURE, ++ RAMINIT_STATUS_POLL_TIMEOUT, + RAMINIT_STATUS_UNSPECIFIED_ERROR, /** TODO: Deprecated in favor of specific values **/ + }; + +@@ -83,10 +85,19 @@ struct sysinfo { + uint8_t rankmap[NUM_CHANNELS]; + uint8_t rank_mirrored[NUM_CHANNELS]; + uint32_t channel_size_mb[NUM_CHANNELS]; ++ ++ uint8_t base_freq; /* Memory base frequency, either 100 or 133 MHz */ ++ uint32_t multiplier; ++ uint32_t mem_clock_mhz; ++ uint32_t mem_clock_fs; /* Memory clock period in femtoseconds */ ++ uint32_t qclkps; /* Quadrature clock period in picoseconds */ + }; + + void raminit_main(enum raminit_boot_mode bootmode); + + enum raminit_status collect_spd_info(struct sysinfo *ctrl); ++enum raminit_status initialise_mpll(struct sysinfo *ctrl); ++ ++enum raminit_status wait_for_first_rcomp(void); + + #endif +diff --git a/src/northbridge/intel/haswell/registers/mchbar.h b/src/northbridge/intel/haswell/registers/mchbar.h +index 5610e7089a..45f8174995 100644 +--- a/src/northbridge/intel/haswell/registers/mchbar.h ++++ b/src/northbridge/intel/haswell/registers/mchbar.h +@@ -13,6 +13,8 @@ + #define MC_INIT_STATE_G 0x5030 + #define MRC_REVISION 0x5034 /* MRC Revision */ + ++#define RCOMP_TIMER 0x5084 ++ + #define MC_LOCK 0x50fc /* Memory Controller Lock register */ + + #define GFXVTBAR 0x5400 /* Base address for IGD */ +@@ -61,6 +63,7 @@ + + #define BIOS_RESET_CPL 0x5da8 /* 8-bit */ + ++#define MC_BIOS_REQ 0x5e00 /* Memory frequency request register */ + #define MC_BIOS_DATA 0x5e04 /* Miscellaneous information for BIOS */ + #define SAPMCTL 0x5f00 + +-- +2.39.2 + -- cgit v1.2.1