2 * PowerMac NVRAM emulation
4 * Copyright (c) 2005-2007 Fabrice Bellard
5 * Copyright (c) 2007 Jocelyn Mayer
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #include "firmware_abi.h"
34 #define NVR_DPRINTF(fmt, ...) \
35 do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0)
37 #define NVR_DPRINTF(fmt, ...)
40 struct MacIONVRAMState {
43 unsigned int it_shift;
47 #define DEF_SYSTEM_SIZE 0xc10
49 /* Direct access to NVRAM */
50 uint32_t macio_nvram_read (void *opaque, uint32_t addr)
52 MacIONVRAMState *s = opaque;
59 NVR_DPRINTF("read addr %04x val %x\n", addr, ret);
64 void macio_nvram_write (void *opaque, uint32_t addr, uint32_t val)
66 MacIONVRAMState *s = opaque;
68 NVR_DPRINTF("write addr %04x val %x\n", addr, val);
73 /* macio style NVRAM device */
74 static void macio_nvram_writeb (void *opaque,
75 target_phys_addr_t addr, uint32_t value)
77 MacIONVRAMState *s = opaque;
79 addr = (addr >> s->it_shift) & (s->size - 1);
80 s->data[addr] = value;
81 NVR_DPRINTF("writeb addr %04x val %x\n", (int)addr, value);
84 static uint32_t macio_nvram_readb (void *opaque, target_phys_addr_t addr)
86 MacIONVRAMState *s = opaque;
89 addr = (addr >> s->it_shift) & (s->size - 1);
90 value = s->data[addr];
91 NVR_DPRINTF("readb addr %04x val %x\n", (int)addr, value);
96 static CPUWriteMemoryFunc * const nvram_write[] = {
102 static CPUReadMemoryFunc * const nvram_read[] = {
108 static const VMStateDescription vmstate_macio_nvram = {
109 .name = "macio_nvram",
111 .minimum_version_id = 1,
112 .minimum_version_id_old = 1,
113 .fields = (VMStateField[]) {
114 VMSTATE_VBUFFER_UINT32(data, MacIONVRAMState, 0, NULL, 0, size),
115 VMSTATE_END_OF_LIST()
120 static void macio_nvram_reset(void *opaque)
124 MacIONVRAMState *macio_nvram_init (int *mem_index, target_phys_addr_t size,
125 unsigned int it_shift)
129 s = qemu_mallocz(sizeof(MacIONVRAMState));
130 s->data = qemu_mallocz(size);
132 s->it_shift = it_shift;
134 s->mem_index = cpu_register_io_memory(nvram_read, nvram_write, s,
135 DEVICE_NATIVE_ENDIAN);
136 *mem_index = s->mem_index;
137 vmstate_register(NULL, -1, &vmstate_macio_nvram, s);
138 qemu_register_reset(macio_nvram_reset, s);
143 void macio_nvram_map (void *opaque, target_phys_addr_t mem_base)
148 cpu_register_physical_memory(mem_base, s->size << s->it_shift,
152 /* Set up a system OpenBIOS NVRAM partition */
153 void pmac_format_nvram_partition (MacIONVRAMState *nvr, int len)
156 uint32_t start = 0, end;
157 struct OpenBIOS_nvpart_v1 *part_header;
159 // OpenBIOS nvram variables
160 // Variable partition
161 part_header = (struct OpenBIOS_nvpart_v1 *)nvr->data;
162 part_header->signature = OPENBIOS_PART_SYSTEM;
163 pstrcpy(part_header->name, sizeof(part_header->name), "system");
165 end = start + sizeof(struct OpenBIOS_nvpart_v1);
166 for (i = 0; i < nb_prom_envs; i++)
167 end = OpenBIOS_set_var(nvr->data, end, prom_envs[i]);
170 nvr->data[end++] = '\0';
172 end = start + ((end - start + 15) & ~15);
173 /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
175 if (end < DEF_SYSTEM_SIZE)
176 end = DEF_SYSTEM_SIZE;
177 OpenBIOS_finish_partition(part_header, end - start);
181 part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
182 part_header->signature = OPENBIOS_PART_FREE;
183 pstrcpy(part_header->name, sizeof(part_header->name), "free");
186 OpenBIOS_finish_partition(part_header, end - start);