1 /*
2 * SPDX-License-Identifier: GPL-2.0-or-later
3 *
4 * QEMU OpenRISC boot helpers.
5 *
6 * (c) 2022 Stafford Horne <shorne@gmail.com>
7 */
8
9 #include "qemu/osdep.h"
10 #include "cpu.h"
11 #include "exec/cpu-defs.h"
12 #include "exec/target_page.h"
13 #include "elf.h"
14 #include "hw/loader.h"
15 #include "hw/openrisc/boot.h"
16 #include "system/device_tree.h"
17 #include "system/qtest.h"
18 #include "system/reset.h"
19 #include "qemu/error-report.h"
20
21 #include <libfdt.h>
22
23 #define KERNEL_LOAD_ADDR 0x100
24
openrisc_load_kernel(ram_addr_t ram_size,const char * kernel_filename,uint32_t * bootstrap_pc)25 hwaddr openrisc_load_kernel(ram_addr_t ram_size,
26 const char *kernel_filename,
27 uint32_t *bootstrap_pc)
28 {
29 long kernel_size;
30 uint64_t elf_entry;
31 uint64_t high_addr;
32 hwaddr entry;
33
34 if (kernel_filename && !qtest_enabled()) {
35 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
36 &elf_entry, NULL, &high_addr, NULL, ELFDATA2MSB,
37 EM_OPENRISC, 1, 0);
38 entry = elf_entry;
39 if (kernel_size < 0) {
40 kernel_size = load_uimage(kernel_filename,
41 &entry, NULL, NULL, NULL, NULL);
42 high_addr = entry + kernel_size;
43 }
44 if (kernel_size < 0) {
45 kernel_size = load_image_targphys(kernel_filename,
46 KERNEL_LOAD_ADDR,
47 ram_size - KERNEL_LOAD_ADDR);
48 high_addr = KERNEL_LOAD_ADDR + kernel_size;
49 }
50
51 if (entry <= 0) {
52 entry = KERNEL_LOAD_ADDR;
53 }
54
55 if (kernel_size < 0) {
56 error_report("couldn't load the kernel '%s'", kernel_filename);
57 exit(1);
58 }
59 *bootstrap_pc = entry;
60
61 return high_addr;
62 }
63 return 0;
64 }
65
openrisc_load_initrd(void * fdt,const char * filename,hwaddr load_start,uint64_t mem_size)66 hwaddr openrisc_load_initrd(void *fdt, const char *filename,
67 hwaddr load_start, uint64_t mem_size)
68 {
69 int size;
70 hwaddr start;
71
72 /* We put the initrd right after the kernel; page aligned. */
73 start = TARGET_PAGE_ALIGN(load_start);
74
75 size = load_ramdisk(filename, start, mem_size - start);
76 if (size < 0) {
77 size = load_image_targphys(filename, start, mem_size - start);
78 if (size < 0) {
79 error_report("could not load ramdisk '%s'", filename);
80 exit(1);
81 }
82 }
83
84 if (fdt) {
85 qemu_fdt_setprop_cell(fdt, "/chosen",
86 "linux,initrd-start", start);
87 qemu_fdt_setprop_cell(fdt, "/chosen",
88 "linux,initrd-end", start + size);
89 }
90
91 return start + size;
92 }
93
openrisc_load_fdt(MachineState * ms,void * fdt,hwaddr load_start,uint64_t mem_size)94 uint32_t openrisc_load_fdt(MachineState *ms, void *fdt,
95 hwaddr load_start, uint64_t mem_size)
96 {
97 uint32_t fdt_addr;
98 int ret;
99 int fdtsize = fdt_totalsize(fdt);
100
101 if (fdtsize <= 0) {
102 error_report("invalid device-tree");
103 exit(1);
104 }
105
106 /* We put fdt right after the kernel and/or initrd. */
107 fdt_addr = TARGET_PAGE_ALIGN(load_start);
108
109 ret = fdt_pack(fdt);
110 /* Should only fail if we've built a corrupted tree */
111 g_assert(ret == 0);
112 /* copy in the device tree */
113
114 /* Save FDT for dumpdtb monitor command */
115 ms->fdt = fdt;
116
117 rom_add_blob_fixed_as("fdt", fdt, fdtsize, fdt_addr,
118 &address_space_memory);
119 qemu_register_reset_nosnapshotload(qemu_fdt_randomize_seeds,
120 rom_ptr_for_as(&address_space_memory, fdt_addr, fdtsize));
121
122 return fdt_addr;
123 }
124