1 // SPDX-License-Identifier: Intel
2 /*
3 * Copyright (C) 2013, Intel Corporation
4 * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
5 */
6
7 #include <common.h>
8 #include <asm/fsp1/fsp_support.h>
9 #include <asm/post.h>
10
fsp_find_header(void)11 struct fsp_header *__attribute__((optimize("O0"))) fsp_find_header(void)
12 {
13 /*
14 * This function may be called before the a stack is established,
15 * so special care must be taken. First, it cannot declare any local
16 * variable using stack. Only register variable can be used here.
17 * Secondly, some compiler version will add prolog or epilog code
18 * for the C function. If so the function call may not work before
19 * stack is ready.
20 *
21 * GCC 4.8.1 has been verified to be working for the following codes.
22 */
23 volatile register u8 *fsp asm("eax");
24
25 /* Initalize the FSP base */
26 fsp = (u8 *)CONFIG_FSP_ADDR;
27
28 /* Check the FV signature, _FVH */
29 if (((struct fv_header *)fsp)->sign == EFI_FVH_SIGNATURE) {
30 /* Go to the end of the FV header and align the address */
31 fsp += ((struct fv_header *)fsp)->ext_hdr_off;
32 fsp += ((struct fv_ext_header *)fsp)->ext_hdr_size;
33 fsp = (u8 *)(((u32)fsp + 7) & 0xFFFFFFF8);
34 } else {
35 fsp = 0;
36 }
37
38 /* Check the FFS GUID */
39 if (fsp &&
40 ((struct ffs_file_header *)fsp)->name.b[0] == FSP_GUID_BYTE0 &&
41 ((struct ffs_file_header *)fsp)->name.b[1] == FSP_GUID_BYTE1 &&
42 ((struct ffs_file_header *)fsp)->name.b[2] == FSP_GUID_BYTE2 &&
43 ((struct ffs_file_header *)fsp)->name.b[3] == FSP_GUID_BYTE3 &&
44 ((struct ffs_file_header *)fsp)->name.b[4] == FSP_GUID_BYTE4 &&
45 ((struct ffs_file_header *)fsp)->name.b[5] == FSP_GUID_BYTE5 &&
46 ((struct ffs_file_header *)fsp)->name.b[6] == FSP_GUID_BYTE6 &&
47 ((struct ffs_file_header *)fsp)->name.b[7] == FSP_GUID_BYTE7 &&
48 ((struct ffs_file_header *)fsp)->name.b[8] == FSP_GUID_BYTE8 &&
49 ((struct ffs_file_header *)fsp)->name.b[9] == FSP_GUID_BYTE9 &&
50 ((struct ffs_file_header *)fsp)->name.b[10] == FSP_GUID_BYTE10 &&
51 ((struct ffs_file_header *)fsp)->name.b[11] == FSP_GUID_BYTE11 &&
52 ((struct ffs_file_header *)fsp)->name.b[12] == FSP_GUID_BYTE12 &&
53 ((struct ffs_file_header *)fsp)->name.b[13] == FSP_GUID_BYTE13 &&
54 ((struct ffs_file_header *)fsp)->name.b[14] == FSP_GUID_BYTE14 &&
55 ((struct ffs_file_header *)fsp)->name.b[15] == FSP_GUID_BYTE15) {
56 /* Add the FFS header size to find the raw section header */
57 fsp += sizeof(struct ffs_file_header);
58 } else {
59 fsp = 0;
60 }
61
62 if (fsp &&
63 ((struct raw_section *)fsp)->type == EFI_SECTION_RAW) {
64 /* Add the raw section header size to find the FSP header */
65 fsp += sizeof(struct raw_section);
66 } else {
67 fsp = 0;
68 }
69
70 return (struct fsp_header *)fsp;
71 }
72
fsp_continue(u32 status,void * hob_list)73 void fsp_continue(u32 status, void *hob_list)
74 {
75 post_code(POST_MRC);
76
77 assert(status == 0);
78
79 /* The boot loader main function entry */
80 fsp_init_done(hob_list);
81 }
82
fsp_init(u32 stack_top,u32 boot_mode,void * nvs_buf)83 void fsp_init(u32 stack_top, u32 boot_mode, void *nvs_buf)
84 {
85 struct fsp_config_data config_data;
86 fsp_init_f init;
87 struct fsp_init_params params;
88 struct fspinit_rtbuf rt_buf;
89 struct fsp_header *fsp_hdr;
90 struct fsp_init_params *params_ptr;
91 #ifdef CONFIG_FSP_USE_UPD
92 struct vpd_region *fsp_vpd;
93 struct upd_region *fsp_upd;
94 #endif
95
96 fsp_hdr = fsp_find_header();
97 if (fsp_hdr == NULL) {
98 /* No valid FSP info header was found */
99 panic("Invalid FSP header");
100 }
101
102 config_data.common.fsp_hdr = fsp_hdr;
103 config_data.common.stack_top = stack_top;
104 config_data.common.boot_mode = boot_mode;
105
106 #ifdef CONFIG_FSP_USE_UPD
107 /* Get VPD region start */
108 fsp_vpd = (struct vpd_region *)(fsp_hdr->img_base +
109 fsp_hdr->cfg_region_off);
110
111 /* Verify the VPD data region is valid */
112 assert(fsp_vpd->sign == VPD_IMAGE_ID);
113
114 fsp_upd = &config_data.fsp_upd;
115
116 /* Copy default data from Flash */
117 memcpy(fsp_upd, (void *)(fsp_hdr->img_base + fsp_vpd->upd_offset),
118 sizeof(struct upd_region));
119
120 /* Verify the UPD data region is valid */
121 assert(fsp_upd->terminator == UPD_TERMINATOR);
122 #endif
123
124 memset(&rt_buf, 0, sizeof(struct fspinit_rtbuf));
125
126 /* Override any configuration if required */
127 fsp_update_configs(&config_data, &rt_buf);
128
129 memset(¶ms, 0, sizeof(struct fsp_init_params));
130 params.nvs_buf = nvs_buf;
131 params.rt_buf = (struct fspinit_rtbuf *)&rt_buf;
132 params.continuation = (fsp_continuation_f)fsp_asm_continuation;
133
134 init = (fsp_init_f)(fsp_hdr->img_base + fsp_hdr->fsp_init);
135 params_ptr = ¶ms;
136
137 post_code(POST_PRE_MRC);
138
139 /* Load GDT for FSP */
140 setup_fsp_gdt();
141
142 /*
143 * Use ASM code to ensure the register value in EAX & EDX
144 * will be passed into fsp_continue
145 */
146 asm volatile (
147 "pushl %0;"
148 "call *%%eax;"
149 ".global fsp_asm_continuation;"
150 "fsp_asm_continuation:;"
151 "movl 4(%%esp), %%eax;" /* status */
152 "movl 8(%%esp), %%edx;" /* hob_list */
153 "jmp fsp_continue;"
154 : : "m"(params_ptr), "a"(init)
155 );
156
157 /*
158 * Should never get here.
159 * Control will continue from fsp_continue.
160 * This line below is to prevent the compiler from optimizing
161 * structure intialization.
162 *
163 * DO NOT REMOVE!
164 */
165 init(¶ms);
166 }
167
fsp_notify(struct fsp_header * fsp_hdr,u32 phase)168 u32 fsp_notify(struct fsp_header *fsp_hdr, u32 phase)
169 {
170 fsp_notify_f notify;
171 struct fsp_notify_params params;
172 struct fsp_notify_params *params_ptr;
173 u32 status;
174
175 if (!fsp_hdr)
176 fsp_hdr = (struct fsp_header *)fsp_find_header();
177
178 if (fsp_hdr == NULL) {
179 /* No valid FSP info header */
180 panic("Invalid FSP header");
181 }
182
183 notify = (fsp_notify_f)(fsp_hdr->img_base + fsp_hdr->fsp_notify);
184 params.phase = phase;
185 params_ptr = ¶ms;
186
187 /*
188 * Use ASM code to ensure correct parameter is on the stack for
189 * FspNotify as U-Boot is using different ABI from FSP
190 */
191 asm volatile (
192 "pushl %1;" /* push notify phase */
193 "call *%%eax;" /* call FspNotify */
194 "addl $4, %%esp;" /* clean up the stack */
195 : "=a"(status) : "m"(params_ptr), "a"(notify), "m"(*params_ptr)
196 );
197
198 return status;
199 }
200