mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
9c17d615a6
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
178 lines
5.1 KiB
C
178 lines
5.1 KiB
C
/*
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* PowerMac NVRAM emulation
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*
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* Copyright (c) 2005-2007 Fabrice Bellard
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* Copyright (c) 2007 Jocelyn Mayer
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h"
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#include "firmware_abi.h"
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#include "sysemu/sysemu.h"
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#include "ppc_mac.h"
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/* debug NVR */
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//#define DEBUG_NVR
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#ifdef DEBUG_NVR
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#define NVR_DPRINTF(fmt, ...) \
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do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0)
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#else
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#define NVR_DPRINTF(fmt, ...)
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#endif
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struct MacIONVRAMState {
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uint32_t size;
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MemoryRegion mem;
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unsigned int it_shift;
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uint8_t *data;
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};
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#define DEF_SYSTEM_SIZE 0xc10
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/* Direct access to NVRAM */
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uint32_t macio_nvram_read (void *opaque, uint32_t addr)
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{
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MacIONVRAMState *s = opaque;
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uint32_t ret;
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if (addr < s->size)
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ret = s->data[addr];
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else
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ret = -1;
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NVR_DPRINTF("read addr %04x val %x\n", addr, ret);
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return ret;
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}
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void macio_nvram_write (void *opaque, uint32_t addr, uint32_t val)
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{
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MacIONVRAMState *s = opaque;
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NVR_DPRINTF("write addr %04x val %x\n", addr, val);
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if (addr < s->size)
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s->data[addr] = val;
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}
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/* macio style NVRAM device */
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static void macio_nvram_writeb(void *opaque, hwaddr addr,
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uint64_t value, unsigned size)
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{
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MacIONVRAMState *s = opaque;
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addr = (addr >> s->it_shift) & (s->size - 1);
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s->data[addr] = value;
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NVR_DPRINTF("writeb addr %04x val %x\n", (int)addr, value);
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}
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static uint64_t macio_nvram_readb(void *opaque, hwaddr addr,
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unsigned size)
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{
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MacIONVRAMState *s = opaque;
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uint32_t value;
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addr = (addr >> s->it_shift) & (s->size - 1);
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value = s->data[addr];
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NVR_DPRINTF("readb addr %04x val %x\n", (int)addr, value);
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return value;
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}
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static const MemoryRegionOps macio_nvram_ops = {
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.read = macio_nvram_readb,
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.write = macio_nvram_writeb,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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static const VMStateDescription vmstate_macio_nvram = {
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.name = "macio_nvram",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField[]) {
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VMSTATE_VBUFFER_UINT32(data, MacIONVRAMState, 0, NULL, 0, size),
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VMSTATE_END_OF_LIST()
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}
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};
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static void macio_nvram_reset(void *opaque)
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{
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}
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MacIONVRAMState *macio_nvram_init (hwaddr size,
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unsigned int it_shift)
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{
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MacIONVRAMState *s;
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s = g_malloc0(sizeof(MacIONVRAMState));
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s->data = g_malloc0(size);
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s->size = size;
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s->it_shift = it_shift;
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memory_region_init_io(&s->mem, &macio_nvram_ops, s, "macio-nvram",
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size << it_shift);
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vmstate_register(NULL, -1, &vmstate_macio_nvram, s);
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qemu_register_reset(macio_nvram_reset, s);
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return s;
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}
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void macio_nvram_setup_bar(MacIONVRAMState *s, MemoryRegion *bar,
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hwaddr mem_base)
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{
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memory_region_add_subregion(bar, mem_base, &s->mem);
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}
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/* Set up a system OpenBIOS NVRAM partition */
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void pmac_format_nvram_partition (MacIONVRAMState *nvr, int len)
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{
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unsigned int i;
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uint32_t start = 0, end;
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struct OpenBIOS_nvpart_v1 *part_header;
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// OpenBIOS nvram variables
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// Variable partition
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part_header = (struct OpenBIOS_nvpart_v1 *)nvr->data;
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part_header->signature = OPENBIOS_PART_SYSTEM;
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pstrcpy(part_header->name, sizeof(part_header->name), "system");
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end = start + sizeof(struct OpenBIOS_nvpart_v1);
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for (i = 0; i < nb_prom_envs; i++)
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end = OpenBIOS_set_var(nvr->data, end, prom_envs[i]);
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// End marker
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nvr->data[end++] = '\0';
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end = start + ((end - start + 15) & ~15);
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/* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
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new variables. */
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if (end < DEF_SYSTEM_SIZE)
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end = DEF_SYSTEM_SIZE;
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OpenBIOS_finish_partition(part_header, end - start);
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// free partition
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start = end;
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part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
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part_header->signature = OPENBIOS_PART_FREE;
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pstrcpy(part_header->name, sizeof(part_header->name), "free");
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end = len;
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OpenBIOS_finish_partition(part_header, end - start);
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}
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