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, args...) \
35 do { printf("NVR: " fmt , ##args); } while (0)
37 #define NVR_DPRINTF(fmt, args...)
40 struct MacIONVRAMState {
41 target_phys_addr_t size;
46 /* Direct access to NVRAM */
47 uint32_t macio_nvram_read (void *opaque, uint32_t addr)
49 MacIONVRAMState *s = opaque;
56 NVR_DPRINTF("read addr %04x val %x\n", addr, ret);
61 void macio_nvram_write (void *opaque, uint32_t addr, uint32_t val)
63 MacIONVRAMState *s = opaque;
65 NVR_DPRINTF("write addr %04x val %x\n", addr, val);
70 /* macio style NVRAM device */
71 static void macio_nvram_writeb (void *opaque,
72 target_phys_addr_t addr, uint32_t value)
74 MacIONVRAMState *s = opaque;
76 addr = (addr >> 4) & (s->size - 1);
77 s->data[addr] = value;
78 NVR_DPRINTF("writeb addr %04x val %x\n", (int)addr, value);
81 static uint32_t macio_nvram_readb (void *opaque, target_phys_addr_t addr)
83 MacIONVRAMState *s = opaque;
86 addr = (addr >> 4) & (s->size - 1);
87 value = s->data[addr];
88 NVR_DPRINTF("readb addr %04x val %x\n", (int)addr, value);
93 static CPUWriteMemoryFunc *nvram_write[] = {
99 static CPUReadMemoryFunc *nvram_read[] = {
105 MacIONVRAMState *macio_nvram_init (int *mem_index, target_phys_addr_t size)
109 s = qemu_mallocz(sizeof(MacIONVRAMState));
112 s->data = qemu_mallocz(size);
119 s->mem_index = cpu_register_io_memory(0, nvram_read, nvram_write, s);
120 *mem_index = s->mem_index;
125 void macio_nvram_map (void *opaque, target_phys_addr_t mem_base)
130 cpu_register_physical_memory(mem_base, s->size << 4, s->mem_index);
133 /* Set up a system OpenBIOS NVRAM partition */
134 void pmac_format_nvram_partition (MacIONVRAMState *nvr, int len)
137 uint32_t start = 0, end;
138 struct OpenBIOS_nvpart_v1 *part_header;
140 // OpenBIOS nvram variables
141 // Variable partition
142 part_header = (struct OpenBIOS_nvpart_v1 *)nvr->data;
143 part_header->signature = OPENBIOS_PART_SYSTEM;
144 pstrcpy(part_header->name, sizeof(part_header->name), "system");
146 end = start + sizeof(struct OpenBIOS_nvpart_v1);
147 for (i = 0; i < nb_prom_envs; i++)
148 end = OpenBIOS_set_var(nvr->data, end, prom_envs[i]);
151 nvr->data[end++] = '\0';
153 end = start + ((end - start + 15) & ~15);
154 OpenBIOS_finish_partition(part_header, end - start);
158 part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
159 part_header->signature = OPENBIOS_PART_FREE;
160 pstrcpy(part_header->name, sizeof(part_header->name), "free");
163 OpenBIOS_finish_partition(part_header, end - start);