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-rw-r--r--hw/nvram/mac_nvram.c213
1 files changed, 213 insertions, 0 deletions
diff --git a/hw/nvram/mac_nvram.c b/hw/nvram/mac_nvram.c
new file mode 100644
index 00000000..d35f8a31
--- /dev/null
+++ b/hw/nvram/mac_nvram.c
@@ -0,0 +1,213 @@
+/*
+ * PowerMac NVRAM emulation
+ *
+ * Copyright (c) 2005-2007 Fabrice Bellard
+ * Copyright (c) 2007 Jocelyn Mayer
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "hw/hw.h"
+#include "hw/nvram/openbios_firmware_abi.h"
+#include "sysemu/sysemu.h"
+#include "hw/ppc/mac.h"
+#include <zlib.h>
+
+/* debug NVR */
+//#define DEBUG_NVR
+
+#ifdef DEBUG_NVR
+#define NVR_DPRINTF(fmt, ...) \
+ do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define NVR_DPRINTF(fmt, ...)
+#endif
+
+#define DEF_SYSTEM_SIZE 0xc10
+
+/* macio style NVRAM device */
+static void macio_nvram_writeb(void *opaque, hwaddr addr,
+ uint64_t value, unsigned size)
+{
+ MacIONVRAMState *s = opaque;
+
+ addr = (addr >> s->it_shift) & (s->size - 1);
+ s->data[addr] = value;
+ NVR_DPRINTF("writeb addr %04" PHYS_PRIx " val %" PRIx64 "\n", addr, value);
+}
+
+static uint64_t macio_nvram_readb(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ MacIONVRAMState *s = opaque;
+ uint32_t value;
+
+ addr = (addr >> s->it_shift) & (s->size - 1);
+ value = s->data[addr];
+ NVR_DPRINTF("readb addr %04x val %x\n", (int)addr, value);
+
+ return value;
+}
+
+static const MemoryRegionOps macio_nvram_ops = {
+ .read = macio_nvram_readb,
+ .write = macio_nvram_writeb,
+ .valid.min_access_size = 1,
+ .valid.max_access_size = 4,
+ .impl.min_access_size = 1,
+ .impl.max_access_size = 1,
+ .endianness = DEVICE_BIG_ENDIAN,
+};
+
+static const VMStateDescription vmstate_macio_nvram = {
+ .name = "macio_nvram",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_VBUFFER_UINT32(data, MacIONVRAMState, 0, NULL, 0, size),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+
+static void macio_nvram_reset(DeviceState *dev)
+{
+}
+
+static void macio_nvram_realizefn(DeviceState *dev, Error **errp)
+{
+ SysBusDevice *d = SYS_BUS_DEVICE(dev);
+ MacIONVRAMState *s = MACIO_NVRAM(dev);
+
+ s->data = g_malloc0(s->size);
+
+ memory_region_init_io(&s->mem, OBJECT(s), &macio_nvram_ops, s,
+ "macio-nvram", s->size << s->it_shift);
+ sysbus_init_mmio(d, &s->mem);
+}
+
+static void macio_nvram_unrealizefn(DeviceState *dev, Error **errp)
+{
+ MacIONVRAMState *s = MACIO_NVRAM(dev);
+
+ g_free(s->data);
+}
+
+static Property macio_nvram_properties[] = {
+ DEFINE_PROP_UINT32("size", MacIONVRAMState, size, 0),
+ DEFINE_PROP_UINT32("it_shift", MacIONVRAMState, it_shift, 0),
+ DEFINE_PROP_END_OF_LIST()
+};
+
+static void macio_nvram_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+
+ dc->realize = macio_nvram_realizefn;
+ dc->unrealize = macio_nvram_unrealizefn;
+ dc->reset = macio_nvram_reset;
+ dc->vmsd = &vmstate_macio_nvram;
+ dc->props = macio_nvram_properties;
+}
+
+static const TypeInfo macio_nvram_type_info = {
+ .name = TYPE_MACIO_NVRAM,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(MacIONVRAMState),
+ .class_init = macio_nvram_class_init,
+};
+
+static void macio_nvram_register_types(void)
+{
+ type_register_static(&macio_nvram_type_info);
+}
+
+/* Set up a system OpenBIOS NVRAM partition */
+static void pmac_format_nvram_partition_of(MacIONVRAMState *nvr, int off,
+ int len)
+{
+ unsigned int i;
+ uint32_t start = off, end;
+ struct OpenBIOS_nvpart_v1 *part_header;
+
+ // OpenBIOS nvram variables
+ // Variable partition
+ part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
+ part_header->signature = OPENBIOS_PART_SYSTEM;
+ pstrcpy(part_header->name, sizeof(part_header->name), "system");
+
+ end = start + sizeof(struct OpenBIOS_nvpart_v1);
+ for (i = 0; i < nb_prom_envs; i++)
+ end = OpenBIOS_set_var(nvr->data, end, prom_envs[i]);
+
+ // End marker
+ nvr->data[end++] = '\0';
+
+ end = start + ((end - start + 15) & ~15);
+ /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
+ new variables. */
+ if (end < DEF_SYSTEM_SIZE)
+ end = DEF_SYSTEM_SIZE;
+ OpenBIOS_finish_partition(part_header, end - start);
+
+ // free partition
+ start = end;
+ part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
+ part_header->signature = OPENBIOS_PART_FREE;
+ pstrcpy(part_header->name, sizeof(part_header->name), "free");
+
+ end = len;
+ OpenBIOS_finish_partition(part_header, end - start);
+}
+
+#define OSX_NVRAM_SIGNATURE (0x5A)
+
+/* Set up a Mac OS X NVRAM partition */
+static void pmac_format_nvram_partition_osx(MacIONVRAMState *nvr, int off,
+ int len)
+{
+ uint32_t start = off;
+ struct OpenBIOS_nvpart_v1 *part_header;
+ unsigned char *data = &nvr->data[start];
+
+ /* empty partition */
+ part_header = (struct OpenBIOS_nvpart_v1 *)data;
+ part_header->signature = OSX_NVRAM_SIGNATURE;
+ pstrcpy(part_header->name, sizeof(part_header->name), "wwwwwwwwwwww");
+
+ OpenBIOS_finish_partition(part_header, len);
+
+ /* Generation */
+ stl_be_p(&data[20], 2);
+
+ /* Adler32 checksum */
+ stl_be_p(&data[16], adler32(0, &data[20], len - 20));
+}
+
+/* Set up NVRAM with OF and OSX partitions */
+void pmac_format_nvram_partition(MacIONVRAMState *nvr, int len)
+{
+ /*
+ * Mac OS X expects side "B" of the flash at the second half of NVRAM,
+ * so we use half of the chip for OF and the other half for a free OSX
+ * partition.
+ */
+ pmac_format_nvram_partition_of(nvr, 0, len / 2);
+ pmac_format_nvram_partition_osx(nvr, len / 2, len / 2);
+}
+type_init(macio_nvram_register_types)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 09:55:48 +0000