| Simon Glass | 780ba48 | 2016-03-11 22:06:58 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016 Google, Inc |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0 |
| 5 | */ |
| 6 | |
| 7 | #include <common.h> |
| 8 | #include <dm.h> |
| 9 | #include <errno.h> |
| 10 | #include <asm/cpu_common.h> |
| 11 | #include <asm/intel_regs.h> |
| 12 | #include <asm/lapic.h> |
| 13 | #include <asm/lpc_common.h> |
| 14 | #include <asm/msr.h> |
| 15 | #include <asm/mtrr.h> |
| 16 | #include <asm/post.h> |
| 17 | #include <asm/microcode.h> |
| 18 | |
| 19 | DECLARE_GLOBAL_DATA_PTR; |
| 20 | |
| 21 | static int report_bist_failure(void) |
| 22 | { |
| 23 | if (gd->arch.bist != 0) { |
| 24 | post_code(POST_BIST_FAILURE); |
| 25 | printf("BIST failed: %08x\n", gd->arch.bist); |
| 26 | return -EFAULT; |
| 27 | } |
| 28 | |
| 29 | return 0; |
| 30 | } |
| 31 | |
| 32 | int cpu_common_init(void) |
| 33 | { |
| 34 | struct udevice *dev, *lpc; |
| 35 | int ret; |
| 36 | |
| 37 | /* Halt if there was a built in self test failure */ |
| 38 | ret = report_bist_failure(); |
| 39 | if (ret) |
| 40 | return ret; |
| 41 | |
| 42 | enable_lapic(); |
| 43 | |
| 44 | ret = microcode_update_intel(); |
| 45 | if (ret && ret != -EEXIST) |
| 46 | return ret; |
| 47 | |
| 48 | /* Enable upper 128bytes of CMOS */ |
| 49 | writel(1 << 2, RCB_REG(RC)); |
| 50 | |
| 51 | /* Early chipset init required before RAM init can work */ |
| 52 | uclass_first_device(UCLASS_NORTHBRIDGE, &dev); |
| 53 | |
| 54 | ret = uclass_first_device(UCLASS_LPC, &lpc); |
| 55 | if (ret) |
| 56 | return ret; |
| 57 | if (!lpc) |
| 58 | return -ENODEV; |
| 59 | |
| 60 | /* Cause the SATA device to do its early init */ |
| Simon Glass | 85ee165 | 2016-05-01 11:35:52 -0600 | [diff] [blame] | 61 | uclass_first_device(UCLASS_AHCI, &dev); |
| Simon Glass | 780ba48 | 2016-03-11 22:06:58 -0700 | [diff] [blame] | 62 | |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | int cpu_set_flex_ratio_to_tdp_nominal(void) |
| 67 | { |
| 68 | msr_t flex_ratio, msr; |
| 69 | u8 nominal_ratio; |
| 70 | |
| 71 | /* Check for Flex Ratio support */ |
| 72 | flex_ratio = msr_read(MSR_FLEX_RATIO); |
| 73 | if (!(flex_ratio.lo & FLEX_RATIO_EN)) |
| 74 | return -EINVAL; |
| 75 | |
| 76 | /* Check for >0 configurable TDPs */ |
| 77 | msr = msr_read(MSR_PLATFORM_INFO); |
| 78 | if (((msr.hi >> 1) & 3) == 0) |
| 79 | return -EINVAL; |
| 80 | |
| 81 | /* Use nominal TDP ratio for flex ratio */ |
| 82 | msr = msr_read(MSR_CONFIG_TDP_NOMINAL); |
| 83 | nominal_ratio = msr.lo & 0xff; |
| 84 | |
| 85 | /* See if flex ratio is already set to nominal TDP ratio */ |
| 86 | if (((flex_ratio.lo >> 8) & 0xff) == nominal_ratio) |
| 87 | return 0; |
| 88 | |
| 89 | /* Set flex ratio to nominal TDP ratio */ |
| 90 | flex_ratio.lo &= ~0xff00; |
| 91 | flex_ratio.lo |= nominal_ratio << 8; |
| 92 | flex_ratio.lo |= FLEX_RATIO_LOCK; |
| 93 | msr_write(MSR_FLEX_RATIO, flex_ratio); |
| 94 | |
| 95 | /* Set flex ratio in soft reset data register bits 11:6 */ |
| 96 | clrsetbits_le32(RCB_REG(SOFT_RESET_DATA), 0x3f << 6, |
| 97 | (nominal_ratio & 0x3f) << 6); |
| 98 | |
| 99 | debug("CPU: Soft reset to set up flex ratio\n"); |
| 100 | |
| 101 | /* Set soft reset control to use register value */ |
| 102 | setbits_le32(RCB_REG(SOFT_RESET_CTRL), 1); |
| 103 | |
| 104 | /* Issue warm reset, will be "CPU only" due to soft reset data */ |
| Simon Glass | 8b73e9f | 2016-03-11 22:06:59 -0700 | [diff] [blame] | 105 | outb(0x0, IO_PORT_RESET); |
| 106 | outb(SYS_RST | RST_CPU, IO_PORT_RESET); |
| Simon Glass | 780ba48 | 2016-03-11 22:06:58 -0700 | [diff] [blame] | 107 | cpu_hlt(); |
| 108 | |
| 109 | /* Not reached */ |
| 110 | return -EINVAL; |
| 111 | } |