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Restore patch series "arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"
[J-u-boot.git] / arch / x86 / cpu / ivybridge / cpu.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2014 Google, Inc
4  * (C) Copyright 2008
5  * Graeme Russ, [email protected].
6  *
7  * Some portions from coreboot src/mainboard/google/link/romstage.c
8  * and src/cpu/intel/model_206ax/bootblock.c
9  * Copyright (C) 2007-2010 coresystems GmbH
10  * Copyright (C) 2011 Google Inc.
11  */
12
13 #include <cpu_func.h>
14 #include <dm.h>
15 #include <errno.h>
16 #include <event.h>
17 #include <fdtdec.h>
18 #include <init.h>
19 #include <log.h>
20 #include <pch.h>
21 #include <asm/cpu.h>
22 #include <asm/cpu_common.h>
23 #include <asm/global_data.h>
24 #include <asm/intel_regs.h>
25 #include <asm/io.h>
26 #include <asm/lapic.h>
27 #include <asm/lpc_common.h>
28 #include <asm/microcode.h>
29 #include <asm/msr.h>
30 #include <asm/mtrr.h>
31 #include <asm/pci.h>
32 #include <asm/post.h>
33 #include <asm/processor.h>
34 #include <asm/arch/model_206ax.h>
35 #include <asm/arch/pch.h>
36 #include <asm/arch/sandybridge.h>
37
38 DECLARE_GLOBAL_DATA_PTR;
39
40 static int set_flex_ratio_to_tdp_nominal(void)
41 {
42         /* Minimum CPU revision for configurable TDP support */
43         if (cpuid_eax(1) < IVB_CONFIG_TDP_MIN_CPUID)
44                 return -EINVAL;
45
46         return cpu_set_flex_ratio_to_tdp_nominal();
47 }
48
49 int arch_cpu_init(void)
50 {
51         post_code(POST_CPU_INIT);
52
53         return x86_cpu_init_f();
54 }
55
56 static int ivybridge_cpu_init(void)
57 {
58         struct pci_controller *hose;
59         struct udevice *bus, *dev;
60         int ret;
61
62         post_code(0x70);
63         ret = uclass_get_device(UCLASS_PCI, 0, &bus);
64         post_code(0x71);
65         if (ret)
66                 return ret;
67         post_code(0x72);
68         hose = dev_get_uclass_priv(bus);
69
70         /* TODO([email protected]): Get rid of gd->hose */
71         gd->hose = hose;
72
73         ret = uclass_first_device_err(UCLASS_LPC, &dev);
74         if (ret)
75                 return ret;
76
77         /*
78          * We should do as little as possible before the serial console is
79          * up. Perhaps this should move to later. Our next lot of init
80          * happens in checkcpu() when we have a console
81          */
82         ret = set_flex_ratio_to_tdp_nominal();
83         if (ret)
84                 return ret;
85
86         return 0;
87 }
88 EVENT_SPY_SIMPLE(EVT_DM_POST_INIT_F, ivybridge_cpu_init);
89
90 #define PCH_EHCI0_TEMP_BAR0 0xe8000000
91 #define PCH_EHCI1_TEMP_BAR0 0xe8000400
92 #define PCH_XHCI_TEMP_BAR0  0xe8001000
93
94 /*
95  * Setup USB controller MMIO BAR to prevent the reference code from
96  * resetting the controller.
97  *
98  * The BAR will be re-assigned during device enumeration so these are only
99  * temporary.
100  *
101  * This is used to speed up the resume path.
102  */
103 static void enable_usb_bar(struct udevice *bus)
104 {
105         pci_dev_t usb0 = PCH_EHCI1_DEV;
106         pci_dev_t usb1 = PCH_EHCI2_DEV;
107         pci_dev_t usb3 = PCH_XHCI_DEV;
108         ulong cmd;
109
110         /* USB Controller 1 */
111         pci_bus_write_config(bus, usb0, PCI_BASE_ADDRESS_0,
112                              PCH_EHCI0_TEMP_BAR0, PCI_SIZE_32);
113         pci_bus_read_config(bus, usb0, PCI_COMMAND, &cmd, PCI_SIZE_32);
114         cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
115         pci_bus_write_config(bus, usb0, PCI_COMMAND, cmd, PCI_SIZE_32);
116
117         /* USB Controller 2 */
118         pci_bus_write_config(bus, usb1, PCI_BASE_ADDRESS_0,
119                              PCH_EHCI1_TEMP_BAR0, PCI_SIZE_32);
120         pci_bus_read_config(bus, usb1, PCI_COMMAND, &cmd, PCI_SIZE_32);
121         cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
122         pci_bus_write_config(bus, usb1, PCI_COMMAND, cmd, PCI_SIZE_32);
123
124         /* USB3 Controller 1 */
125         pci_bus_write_config(bus, usb3, PCI_BASE_ADDRESS_0,
126                              PCH_XHCI_TEMP_BAR0, PCI_SIZE_32);
127         pci_bus_read_config(bus, usb3, PCI_COMMAND, &cmd, PCI_SIZE_32);
128         cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
129         pci_bus_write_config(bus, usb3, PCI_COMMAND, cmd, PCI_SIZE_32);
130 }
131
132 int checkcpu(void)
133 {
134         enum pei_boot_mode_t boot_mode = PEI_BOOT_NONE;
135         struct udevice *dev, *lpc;
136         uint32_t pm1_cnt;
137         uint16_t pm1_sts;
138         int ret;
139
140         /* TODO: cmos_post_init() */
141         if (readl(MCHBAR_REG(SSKPD)) == 0xCAFE) {
142                 debug("soft reset detected\n");
143                 boot_mode = PEI_BOOT_SOFT_RESET;
144
145                 /* System is not happy after keyboard reset... */
146                 debug("Issuing CF9 warm reset\n");
147                 reset_cpu();
148         }
149
150         ret = cpu_common_init();
151         if (ret) {
152                 debug("%s: cpu_common_init() failed\n", __func__);
153                 return ret;
154         }
155
156         /* Check PM1_STS[15] to see if we are waking from Sx */
157         pm1_sts = inw(DEFAULT_PMBASE + PM1_STS);
158
159         /* Read PM1_CNT[12:10] to determine which Sx state */
160         pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT);
161
162         if ((pm1_sts & WAK_STS) && ((pm1_cnt >> 10) & 7) == 5) {
163                 debug("Resume from S3 detected, but disabled.\n");
164         } else {
165                 /*
166                  * TODO: An indication of life might be possible here (e.g.
167                  * keyboard light)
168                  */
169         }
170         post_code(POST_EARLY_INIT);
171
172         /* Enable SPD ROMs and DDR-III DRAM */
173         ret = uclass_first_device_err(UCLASS_I2C, &dev);
174         if (ret) {
175                 debug("%s: Failed to get I2C (ret=%d)\n", __func__, ret);
176                 return ret;
177         }
178
179         /* Prepare USB controller early in S3 resume */
180         if (boot_mode == PEI_BOOT_RESUME) {
181                 uclass_first_device(UCLASS_LPC, &lpc);
182                 enable_usb_bar(pci_get_controller(lpc->parent));
183         }
184
185         gd->arch.pei_boot_mode = boot_mode;
186
187         return 0;
188 }
189
190 int print_cpuinfo(void)
191 {
192         char processor_name[CPU_MAX_NAME_LEN];
193         const char *name;
194
195         /* Print processor name */
196         name = cpu_get_name(processor_name);
197         printf("CPU:   %s\n", name);
198
199         post_code(POST_CPU_INFO);
200
201         return 0;
202 }
203
204 void board_debug_uart_init(void)
205 {
206         /* This enables the debug UART */
207         pci_x86_write_config(PCH_LPC_DEV, LPC_EN, COMA_LPC_EN, PCI_SIZE_16);
208 }
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