diff options
Diffstat (limited to 'src/cpu/via/nano')
| -rw-r--r-- | src/cpu/via/nano/Kconfig | 41 | ||||
| -rw-r--r-- | src/cpu/via/nano/Makefile.inc | 33 | ||||
| -rw-r--r-- | src/cpu/via/nano/nano_init.c | 204 | ||||
| -rw-r--r-- | src/cpu/via/nano/update_ucode.c | 150 | ||||
| -rw-r--r-- | src/cpu/via/nano/update_ucode.h | 73 |
5 files changed, 501 insertions, 0 deletions
diff --git a/src/cpu/via/nano/Kconfig b/src/cpu/via/nano/Kconfig new file mode 100644 index 0000000000..3b1c2137e8 --- /dev/null +++ b/src/cpu/via/nano/Kconfig @@ -0,0 +1,41 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2011 Alexandru Gagniuc <mr.nuke.me@gmail.com> +## +## 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, either version 2 of the License, or +## (at your option) any later version. +## +## 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, see <http://www.gnu.org/licenses/>. +## + +config CPU_VIA_NANO + bool + +if CPU_VIA_NANO + +config CPU_SPECIFIC_OPTIONS + def_bool y + select UDELAY_TSC + select MMX + select SSE2 + select CACHE_AS_RAM + select CPU_MICROCODE_IN_CBFS + +config DCACHE_RAM_BASE + hex + default 0xffe00000 + +config DCACHE_RAM_SIZE + hex + default 0x8000 + +endif # CPU_VIA_NANO diff --git a/src/cpu/via/nano/Makefile.inc b/src/cpu/via/nano/Makefile.inc new file mode 100644 index 0000000000..6b0c1e934a --- /dev/null +++ b/src/cpu/via/nano/Makefile.inc @@ -0,0 +1,33 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> +## +## 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, either version 2 of the License, or +## (at your option) any later version. +## +## 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, see <http://www.gnu.org/licenses/>. +## + +subdirs-y += ../../x86/tsc +subdirs-y += ../../x86/mtrr +subdirs-y += ../../x86/lapic +subdirs-y += ../../x86/cache +subdirs-y += ../../x86/smm + +driver-y += nano_init.c +ramstage-y += update_ucode.c + +# We need to hear from VIA to get permission to include this file in the +# official coreboot repository. Until then, we leave this commented out +# cpu-microcode-y += nano_ucode_blob.c + +cpu_incs += $(src)/cpu/via/car/cache_as_ram.inc diff --git a/src/cpu/via/nano/nano_init.c b/src/cpu/via/nano/nano_init.c new file mode 100644 index 0000000000..417119f356 --- /dev/null +++ b/src/cpu/via/nano/nano_init.c @@ -0,0 +1,204 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> + * + * 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, either version 2 of the License, or + * (at your option) any later version. + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#include "update_ucode.h" +#include <console/console.h> +#include <device/device.h> +#include <cpu/cpu.h> +#include <cpu/x86/mtrr.h> +#include <cpu/x86/msr.h> +#include <cpu/x86/lapic.h> +#include <cpu/x86/cache.h> +#include <delay.h> + +#define MODEL_NANO 0x2 +#define MODEL_NANO_3000_B0 0x8 +#define MODEL_NANO_3000_B2 0xa + +#define MSR_IA32_PERF_STATUS 0x00000198 +#define MSR_IA32_PERF_CTL 0x00000199 +#define MSR_IA32_MISC_ENABLE 0x000001a0 +#define NANO_MYSTERIOUS_MSR 0x120e + +static void nano_finish_fid_vid_transition(void) +{ + + msr_t msr; + /* Wait until the power transition ends */ + int cnt = 0; + do { + udelay(16); + msr = rdmsr(MSR_IA32_PERF_STATUS); + cnt++; + if (cnt > 128) { + printk(BIOS_WARNING, + "Error while updating multiplier and voltage\n"); + break; + } + } while (msr.lo & ((1 << 16) | (1 << 17))); + + /* Print the new FID and Voltage */ + u8 cur_vid = (msr.lo >> 0) & 0xff; + u8 cur_fid = (msr.lo >> 8) & 0xff; + printk(BIOS_INFO, "New CPU multiplier: %dx\n", cur_fid); + printk(BIOS_INFO, "New Voltage ID : %dx\n", cur_vid); +} + +static void nano_set_max_fid_vid(void) +{ + msr_t msr; + /* Get voltage and frequency info */ + msr = rdmsr(MSR_IA32_PERF_STATUS); + u8 min_fid = (msr.hi >> 24); + u8 max_fid = (msr.hi >> 8) & 0xff; + u8 min_vid = (msr.hi >> 16) & 0xff; + u8 max_vid = (msr.hi >> 0) & 0xff; + u8 cur_vid = (msr.lo >> 0) & 0xff; + u8 cur_fid = (msr.lo >> 8) & 0xff; + + printk(BIOS_INFO, "CPU multiplier: %dx (min %dx; max %dx)\n", + cur_fid, min_fid, max_fid); + printk(BIOS_INFO, "Voltage ID : %dx (min %dx; max %dx)\n", + cur_vid, min_vid, max_vid); + + if( (cur_fid != max_fid) || (cur_vid != max_vid) ) { + /* Set highest frequency and VID */ + msr.lo = msr.hi; + msr.hi = 0; + wrmsr(MSR_IA32_PERF_CTL, msr); + /* Wait for the transition to complete, otherwise, the CPU + * might reset itself repeatedly */ + nano_finish_fid_vid_transition(); + } + /* As a side note, if we didn't update the microcode by this point, the + * second PLL will not lock correctly. The clock will still be provided + * by the first PLL, and execution will continue normally, ___until___ + * the CPU switches PLL. Once that happens we will no longer have a + * working clock source, and the CPU will hang + * Moral of the story: update the microcode, or don't change FID + * This check is handled before calling nano_power() */ +} + +static void nano_power(void) +{ + msr_t msr; + /* Enable Powersaver */ + msr = rdmsr(MSR_IA32_MISC_ENABLE); + msr.lo |= (1 << 16); + wrmsr(MSR_IA32_MISC_ENABLE, msr); + + /* Enable 6 bit or 7-bit VRM support + * This MSR is not documented by VIA docs, other than setting these + * bits */ + msr = rdmsr(NANO_MYSTERIOUS_MSR); + msr.lo |= ( (1<<7) | (1<<4) ); + /* FIXME: Do we have a 6-bit or 7-bit VRM? + * set bit [5] for 7-bit, or don't set it for 6 bit VRM + * This will probably require a Kconfig option + * My board has a 7-bit VRM, so I can't test the 6-bit VRM stuff */ + msr.lo |= (1<<5); + wrmsr(NANO_MYSTERIOUS_MSR, msr); + + /* Set the maximum frequency and voltage */ + nano_set_max_fid_vid(); + + /* Enable TM3 */ + msr = rdmsr(MSR_IA32_MISC_ENABLE); + msr.lo |= ( (1<<3) | (1<<13) ); + wrmsr(MSR_IA32_MISC_ENABLE, msr); + + u8 stepping = ( cpuid_eax(0x1) ) &0xf; + if(stepping >= MODEL_NANO_3000_B0) { + /* Hello Nano 3000. The Terminator needs a CPU upgrade */ + /* Enable C1e, C2e, C3e, and C4e states */ + msr = rdmsr(MSR_IA32_MISC_ENABLE); + msr.lo |= ( (1<<25) | (1<<26) | (1<<31)); /* C1e, C2e, C3e */ + msr.hi |= (1<<0); /* C4e */ + wrmsr(MSR_IA32_MISC_ENABLE, msr); + } + + /* Lock on Powersaver */ + msr = rdmsr(MSR_IA32_MISC_ENABLE); + msr.lo |= (1<<20); + wrmsr(MSR_IA32_MISC_ENABLE, msr); +} + +static void nano_init(device_t dev) +{ + struct cpuinfo_x86 c; + + get_fms(&c, dev->device); + + /* We didn't test this on the Nano 1000/2000 series, so warn the user */ + if(c.x86_mask < MODEL_NANO_3000_B0) { + printk(BIOS_EMERG, "WARNING: This CPU has not been tested. " + "Please report any issues encountered. \n"); + } + switch (c.x86_mask) { + case MODEL_NANO: + printk(BIOS_INFO, "VIA Nano"); + break; + case MODEL_NANO_3000_B0: + printk(BIOS_INFO, "VIA Nano 3000 rev B0"); + break; + case MODEL_NANO_3000_B2: + printk(BIOS_INFO, "VIA Nano 3000 rev B2"); + break; + default: + printk(BIOS_EMERG, "Stepping not recognized: %x\n", c.x86_mask); + } + printk(BIOS_INFO, "\n"); + + /* We only read microcode from CBFS. If we don't have any microcode in + * CBFS, we'll just get back with 0 updates. User choice FTW. */ + unsigned int n_updates = nano_update_ucode(); + + if(n_updates != 0){ + nano_power(); + } else { + /* Changing the frequency or voltage without first updating the + * microcode will hang the CPU, so just don't do it */ + printk(BIOS_EMERG, "WARNING: CPU Microcode not updated.\n" + " Will not change frequency, as this may hang the CPU.\n"); + } + + /* Turn on cache */ + x86_enable_cache(); + /* Set up Memory Type Range Registers */ + x86_setup_mtrrs(); + x86_mtrr_check(); + /* Enable the local cpu apics */ + setup_lapic(); +} + +static struct device_operations cpu_dev_ops = { + .init = nano_init, +}; + +static struct cpu_device_id cpu_table[] = { + {X86_VENDOR_CENTAUR, 0x06f2}, // VIA NANO 1000/2000 Series + {X86_VENDOR_CENTAUR, 0x06f8}, // VIA NANO 3000 rev B0 + {X86_VENDOR_CENTAUR, 0x06fa}, // VIA NANO 3000 rev B2 + {0, 0}, +}; + +static const struct cpu_driver driver __cpu_driver = { + .ops = &cpu_dev_ops, + .id_table = cpu_table, +}; diff --git a/src/cpu/via/nano/update_ucode.c b/src/cpu/via/nano/update_ucode.c new file mode 100644 index 0000000000..8f7ee224a4 --- /dev/null +++ b/src/cpu/via/nano/update_ucode.c @@ -0,0 +1,150 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> + * + * 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, either version 2 of the License, or + * (at your option) any later version. + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#include "update_ucode.h" +#include <cpu/x86/msr.h> +#include <console/console.h> +#include <stddef.h> +#include <cpu/cpu.h> +#include <arch/cpu.h> +#include <cbfs.h> + +static ucode_update_status nano_apply_ucode(const nano_ucode_header *ucode) +{ + printk(BIOS_SPEW, "Attempting to apply microcode update\n"); + + msr_t msr; + /* Address of ucode block goes in msr.lo for 32-bit mode + * Now remember, we need to pass the address of the actual microcode, + * not the header. The header is just there to help us. */ + msr.lo = (unsigned int)(&(ucode->ucode_start)); + msr.hi = 0; + wrmsr(MSR_IA32_BIOS_UPDT_TRIG, msr); + + /* Let's see if we updated succesfully */ + msr = rdmsr(MSR_UCODE_UPDATE_STATUS); + + return msr.lo & 0x07; +} + +static void nano_print_ucode_info(const nano_ucode_header *ucode) +{ + printk(BIOS_SPEW, "Microcode update information:\n"); + printk(BIOS_SPEW, "Name: %8s\n", ucode->name ); + printk(BIOS_SPEW, "Date: %u/%u/%u\n", ucode->month, + ucode->day, ucode->year ); +} + +static ucode_validity nano_ucode_is_valid(const nano_ucode_header *ucode) +{ + /* We must have a valid signature */ + if(ucode->signature != NANO_UCODE_SIGNATURE) + return NANO_UCODE_SIGNATURE_ERROR; + /* The size of the head must be exactly 12 double words */ + if( (ucode->total_size - ucode->payload_size) != NANO_UCODE_HEADER_SIZE) + return NANO_UCODE_WRONG_SIZE; + + /* How about a checksum ? Checksum must be 0 + * Two's complement done over the entire file, including the header */ + int i; + u32 check = 0; + u32 *raw = (void*) ucode; + for(i = 0 ; i < ((ucode->total_size) >> 2); i++) { + check += raw[i]; + } + if(check != 0) + return NANO_UCODE_CHECKSUM_FAIL; + /* Made it here huh? Then it looks valid to us. + * If there's anything else wrong, the CPU will reject the update */ + return NANO_UCODE_VALID; +} + +static void nano_print_ucode_status(ucode_update_status stat) +{ + switch(stat) + { + case UCODE_UPDATE_SUCCESS: + printk(BIOS_INFO, "Microcode update succesful.\n"); + break; + case UCODE_UPDATE_FAIL: + printk(BIOS_ALERT, "Microcode update failed, bad environment." + "Update was not applied.\n"); + break; + case UCODE_UPDATE_WRONG_CPU: + printk(BIOS_ALERT, "Update not applicable to this CPU.\n"); + break; + case UCODE_INVALID_UPDATE_BLOCK: + printk(BIOS_ALERT, "Microcode block invalid." + "Update was not applied.\n"); + break; + default: + printk(BIOS_ALERT, "Unknown status. No update applied.\n"); + } +} + +unsigned int nano_update_ucode(void) +{ + size_t i; + unsigned int n_updates = 0; + const struct cbfs_file *cbfs_ucode; + u32 fms = cpuid_eax(0x1); + + cbfs_ucode = cbfs_find("cpu_microcode_blob.bin"); + /* Oops, did you forget to include the microcode ? */ + if(cbfs_ucode == NULL) { + printk(BIOS_ALERT, "WARNING: No microcode file found in CBFS. " + "Aborting microcode updates\n"); + return 0; + } + + /* Considering we are running with eXecute-In-Place (XIP), there's no + * need to worry that accessing data from ROM will slow us down. + * Microcode data should be aligned to a 4-byte boundary, but CBFS + * already does that for us (Do you, CBFS?) */ + const u32 *ucode_data = CBFS_SUBHEADER(cbfs_ucode); + const u32 ucode_len = ntohl(cbfs_ucode->len); + + /* We might do a lot of loops searching for the microcode updates, but + * keep in mind, nano_ucode_is_valid searches for the signature before + * doing anything else. */ + for( i = 0; i < (ucode_len >> 2); /* don't increment i here */ ) + { + ucode_update_status stat; + const nano_ucode_header * ucode = (void *)(&ucode_data[i]); + if(nano_ucode_is_valid(ucode) != NANO_UCODE_VALID) { + i++; + continue; + } + /* Since we have a valid microcode, there's no need to search + * in this region, so we restart our search at the end of this + * microcode */ + i += (ucode->total_size >> 2); + /* Is the microcode compatible with our CPU? */ + if(ucode->applicable_fms != fms) continue; + /* For our most curious users */ + nano_print_ucode_info(ucode); + /* The meat of the pie */ + stat = nano_apply_ucode(ucode); + /* The user might want to know how the update went */ + nano_print_ucode_status(stat); + if(stat == UCODE_UPDATE_SUCCESS) n_updates++; + } + + return n_updates; +} diff --git a/src/cpu/via/nano/update_ucode.h b/src/cpu/via/nano/update_ucode.h new file mode 100644 index 0000000000..6a22d183a7 --- /dev/null +++ b/src/cpu/via/nano/update_ucode.h @@ -0,0 +1,73 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> + * + * 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, either version 2 of the License, or + * (at your option) any later version. + * + * 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, see <http://www.gnu.org/licenses/>. + */ +#ifndef __UPDATE_UCODE_H +#define __UPDATE_UCODE_H + +#include <console/console.h> +#include <cpu/cpu.h> + +#define MSR_IA32_BIOS_UPDT_TRIG 0x00000079 +#define MSR_IA32_BIOS_SIGN_ID 0x0000008b +#define MSR_UCODE_UPDATE_STATUS 0x00001205 + +#define NANO_UCODE_SIGNATURE 0x53415252 +#define NANO_UCODE_HEADER_SIZE 0x30 + +/* These are values returned by the CPU after we attempt microcode updates. + * We care what these values are exactly, so we define them to be sure */ +typedef enum { + UCODE_UPDATE_NOT_ATTEMPTED = 0x0, + UCODE_UPDATE_SUCCESS = 0x1, + UCODE_UPDATE_FAIL = 0x2, + UCODE_UPDATE_WRONG_CPU = 0x3, + UCODE_INVALID_UPDATE_BLOCK = 0x4, +} ucode_update_status; + + +typedef enum { + NANO_UCODE_VALID = 0, /* We only care that valid == 0 */ + NANO_UCODE_SIGNATURE_ERROR, + NANO_UCODE_WRONG_SIZE, + NANO_UCODE_CHECKSUM_FAIL, +} ucode_validity; + +typedef struct { + u32 signature; /* NANO_UCODE_SIGNATURE */ + u32 update_revision; /* Revision of the update header */ + u16 year; /* Year of patch release */ + u8 day; /* Day of patch release */ + u8 month; /* Month of patch release */ + u32 applicable_fms; /* Fam/model/stepping to which ucode applies */ + u32 checksum; /* Two's complement checksum of ucode+header */ + u32 loader_revision; /* Revision of hardware ucode update loader*/ + u32 rfu_1; /* Reservod for future use */ + u32 payload_size; /* Size of the ucode payload only */ + u32 total_size; /* Size of the ucode, including header */ + char name[8]; /* ASCII string of ucode filename */ + u32 rfu_2; /* Reservod for future use */ + /* First double-word of the ucode payload + * Its address represents the beginning of the ucode update we need to + * send to the CPU */ + u32 ucode_start; + +} nano_ucode_header; + +unsigned int nano_update_ucode(void); + +#endif /* __UPDATE_UCODE_H */ |