| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <cpu/cpu.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/intel/speedstep.h> |
| #include <cpu/x86/cache.h> |
| #include <cpu/x86/name.h> |
| |
| #define HIGHEST_CLEVEL 3 |
| static void configure_c_states(void) |
| { |
| msr_t msr; |
| |
| msr = rdmsr(MSR_PKG_CST_CONFIG_CONTROL); |
| msr.lo |= (1 << 15); // config lock until next reset |
| msr.lo |= (1 << 10); // Enable I/O MWAIT redirection for C-States |
| msr.lo &= ~(1 << 9); // Issue a single stop grant cycle upon stpclk |
| msr.lo |= (1 << 3); // dynamic L2 |
| |
| /* Number of supported C-States */ |
| msr.lo &= ~7; |
| msr.lo |= HIGHEST_CLEVEL; // support at most C3 |
| |
| wrmsr(MSR_PKG_CST_CONFIG_CONTROL, msr); |
| |
| /* Set Processor MWAIT IO BASE (P_BLK) */ |
| msr.hi = 0; |
| msr.lo = ((PMB0_BASE + 4) & 0xffff) | (((PMB1_BASE + 9) & 0xffff) |
| << 16); |
| wrmsr(MSR_PMG_IO_BASE_ADDR, msr); |
| |
| /* Set C_LVL controls and IO Capture Address */ |
| msr.hi = 0; |
| // -2 because LVL0+1 aren't counted |
| msr.lo = (PMB0_BASE + 4) | ((HIGHEST_CLEVEL - 2) << 16); |
| wrmsr(MSR_PMG_IO_CAPTURE_ADDR, msr); |
| } |
| |
| static void configure_misc(void) |
| { |
| msr_t msr; |
| |
| msr = rdmsr(IA32_MISC_ENABLE); |
| msr.lo |= (1 << 3); /* TM1 enable */ |
| msr.lo |= (1 << 13); /* TM2 enable */ |
| msr.lo |= (1 << 17); /* Bidirectional PROCHOT# */ |
| |
| msr.lo |= (1 << 10); /* FERR# multiplexing */ |
| |
| // TODO: Only if IA32_PLATFORM_ID[17] = 0 and IA32_PLATFORM_ID[50] = 1 |
| msr.lo |= (1 << 16); /* Enhanced SpeedStep Enable */ |
| |
| /* Enable C2E */ |
| msr.lo |= (1 << 26); |
| |
| /* Enable C4E */ |
| msr.hi |= (1 << (32 - 32)); // C4E |
| msr.hi |= (1 << (33 - 32)); // Hard C4E |
| |
| wrmsr(IA32_MISC_ENABLE, msr); |
| |
| msr.lo |= (1 << 20); /* Lock Enhanced SpeedStep Enable */ |
| wrmsr(IA32_MISC_ENABLE, msr); |
| |
| // set maximum CPU speed |
| msr = rdmsr(IA32_PERF_STATUS); |
| int busratio_max = (msr.hi >> (40-32)) & 0x1f; |
| |
| msr = rdmsr(IA32_PLATFORM_ID); |
| int vid_max = msr.lo & 0x3f; |
| |
| msr.lo &= ~0xffff; |
| msr.lo |= busratio_max << 8; |
| msr.lo |= vid_max; |
| |
| wrmsr(IA32_PERF_CTL, msr); |
| } |
| |
| #define PIC_SENS_CFG 0x1aa |
| static void configure_pic_thermal_sensors(void) |
| { |
| msr_t msr; |
| |
| msr = rdmsr(PIC_SENS_CFG); |
| |
| msr.lo |= (1 << 21); // inter-core lock TM1 |
| msr.lo |= (1 << 4); // Enable bypass filter |
| |
| wrmsr(PIC_SENS_CFG, msr); |
| } |
| |
| static void model_6ex_init(struct device *cpu) |
| { |
| char processor_name[49]; |
| |
| /* Turn on caching if we haven't already */ |
| enable_cache(); |
| |
| /* Print processor name */ |
| fill_processor_name(processor_name); |
| printk(BIOS_INFO, "CPU: %s.\n", processor_name); |
| |
| /* Setup Page Attribute Tables (PAT) */ |
| // TODO set up PAT |
| |
| /* Configure C States */ |
| configure_c_states(); |
| |
| /* Configure Enhanced SpeedStep and Thermal Sensors */ |
| configure_misc(); |
| |
| /* PIC thermal sensor control */ |
| configure_pic_thermal_sensors(); |
| } |
| |
| static struct device_operations cpu_dev_ops = { |
| .init = model_6ex_init, |
| }; |
| |
| static const struct cpu_device_id cpu_table[] = { |
| { X86_VENDOR_INTEL, 0x06e0 }, /* Intel Core Solo/Core Duo */ |
| { X86_VENDOR_INTEL, 0x06e8 }, /* Intel Core Solo/Core Duo */ |
| { X86_VENDOR_INTEL, 0x06ec }, /* Intel Core Solo/Core Duo */ |
| { 0, 0 }, |
| }; |
| |
| static const struct cpu_driver driver __cpu_driver = { |
| .ops = &cpu_dev_ops, |
| .id_table = cpu_table, |
| }; |