1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <acpi/acpi.h>
4 #include <acpi/acpigen.h>
5 #include <bootstate.h>
6 #include <types.h>
7 #include <string.h>
8 #include <stdlib.h>
9 #include <cbfs.h>
10 #include <cbmem.h>
11 #include <console/console.h>
12 #include <ec/google/chromeec/ec.h>
13 #include <fmap.h>
14 #include <security/vboot/vbnv.h>
15 #include <security/vboot/vboot_common.h>
16 #include <smbios.h>
17
18 #include "chromeos.h"
19 #include "gnvs.h"
20
21 static struct chromeos_acpi *chromeos_acpi;
22
chromeos_vpd_region(const char * region,uintptr_t * base)23 static size_t chromeos_vpd_region(const char *region, uintptr_t *base)
24 {
25 struct region_device vpd;
26
27 if (fmap_locate_area_as_rdev(region, &vpd))
28 return 0;
29
30 *base = (uintptr_t)rdev_mmap_full(&vpd);
31
32 return region_device_sz(&vpd);
33 }
34
chromeos_init_chromeos_acpi(void * unused)35 static void chromeos_init_chromeos_acpi(void *unused)
36 {
37 size_t vpd_size;
38 uintptr_t vpd_base = 0;
39
40 chromeos_acpi = cbmem_add(CBMEM_ID_ACPI_CNVS, sizeof(struct chromeos_acpi));
41 if (!chromeos_acpi)
42 return;
43
44 /* Retain CNVS contents on S3 resume path. */
45 if (acpi_is_wakeup_s3())
46 return;
47
48 vpd_size = chromeos_vpd_region("RO_VPD", &vpd_base);
49 if (vpd_size && vpd_base) {
50 chromeos_acpi->vpd_ro_base = vpd_base;
51 chromeos_acpi->vpd_ro_size = vpd_size;
52 }
53
54 vpd_size = chromeos_vpd_region("RW_VPD", &vpd_base);
55 if (vpd_size && vpd_base) {
56 chromeos_acpi->vpd_rw_base = vpd_base;
57 chromeos_acpi->vpd_rw_size = vpd_size;
58 }
59 }
60
61 BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_EXIT, chromeos_init_chromeos_acpi, NULL);
62
chromeos_set_me_hash(u32 * hash,int len)63 void chromeos_set_me_hash(u32 *hash, int len)
64 {
65 if ((len*sizeof(u32)) > sizeof(chromeos_acpi->mehh))
66 return;
67
68 /* Copy to NVS. */
69 if (chromeos_acpi)
70 memcpy(chromeos_acpi->mehh, hash, len*sizeof(u32));
71 }
72
chromeos_set_ramoops(void * ram_oops,size_t size)73 void chromeos_set_ramoops(void *ram_oops, size_t size)
74 {
75 if (!chromeos_acpi)
76 return;
77
78 printk(BIOS_DEBUG, "Ramoops buffer: 0x%zx@%p.\n", size, ram_oops);
79 chromeos_acpi->ramoops_base = (uintptr_t)ram_oops;
80 chromeos_acpi->ramoops_len = size;
81 }
82
smbios_type0_bios_version(uintptr_t address)83 void smbios_type0_bios_version(uintptr_t address)
84 {
85 if (!chromeos_acpi)
86 return;
87 /* Location of smbios_type0.bios_version() string filled with spaces. */
88 chromeos_acpi->vbt10 = address;
89 }
90
acpi_fill_cnvs(void)91 void acpi_fill_cnvs(void)
92 {
93 const struct opregion cnvs_op = OPREGION("CNVS", SYSTEMMEMORY, (uintptr_t)chromeos_acpi,
94 sizeof(*chromeos_acpi));
95
96 if (!chromeos_acpi)
97 return;
98
99 acpigen_write_scope("\\");
100 acpigen_write_opregion(&cnvs_op);
101 acpigen_pop_len();
102
103 chromeos_acpi_gpio_generate();
104 }
105