| /* |
| * QEMU PowerNV PNOR simple model |
| * |
| * Copyright (c) 2015-2019, IBM Corporation. |
| * |
| * This code is licensed under the GPL version 2 or later. See the |
| * COPYING file in the top-level directory. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| #include "qemu/error-report.h" |
| #include "qemu/log.h" |
| #include "sysemu/block-backend.h" |
| #include "sysemu/blockdev.h" |
| #include "hw/loader.h" |
| #include "hw/ppc/pnv_pnor.h" |
| #include "hw/qdev-properties.h" |
| |
| static uint64_t pnv_pnor_read(void *opaque, hwaddr addr, unsigned size) |
| { |
| PnvPnor *s = PNV_PNOR(opaque); |
| uint64_t ret = 0; |
| int i; |
| |
| for (i = 0; i < size; i++) { |
| ret |= (uint64_t) s->storage[addr + i] << (8 * (size - i - 1)); |
| } |
| |
| return ret; |
| } |
| |
| static void pnv_pnor_update(PnvPnor *s, int offset, int size) |
| { |
| int offset_end; |
| int ret; |
| |
| if (s->blk) { |
| return; |
| } |
| |
| offset_end = offset + size; |
| offset = QEMU_ALIGN_DOWN(offset, BDRV_SECTOR_SIZE); |
| offset_end = QEMU_ALIGN_UP(offset_end, BDRV_SECTOR_SIZE); |
| |
| ret = blk_pwrite(s->blk, offset, s->storage + offset, |
| offset_end - offset, 0); |
| if (ret < 0) { |
| error_report("Could not update PNOR: %s", strerror(-ret)); |
| } |
| } |
| |
| static void pnv_pnor_write(void *opaque, hwaddr addr, uint64_t data, |
| unsigned size) |
| { |
| PnvPnor *s = PNV_PNOR(opaque); |
| int i; |
| |
| for (i = 0; i < size; i++) { |
| s->storage[addr + i] = (data >> (8 * (size - i - 1))) & 0xFF; |
| } |
| pnv_pnor_update(s, addr, size); |
| } |
| |
| /* |
| * TODO: Check endianness: skiboot is BIG, Aspeed AHB is LITTLE, flash |
| * is BIG. |
| */ |
| static const MemoryRegionOps pnv_pnor_ops = { |
| .read = pnv_pnor_read, |
| .write = pnv_pnor_write, |
| .endianness = DEVICE_BIG_ENDIAN, |
| .valid = { |
| .min_access_size = 1, |
| .max_access_size = 4, |
| }, |
| }; |
| |
| static void pnv_pnor_realize(DeviceState *dev, Error **errp) |
| { |
| PnvPnor *s = PNV_PNOR(dev); |
| int ret; |
| |
| if (s->blk) { |
| uint64_t perm = BLK_PERM_CONSISTENT_READ | |
| (blk_is_read_only(s->blk) ? 0 : BLK_PERM_WRITE); |
| ret = blk_set_perm(s->blk, perm, BLK_PERM_ALL, errp); |
| if (ret < 0) { |
| return; |
| } |
| |
| s->size = blk_getlength(s->blk); |
| if (s->size <= 0) { |
| error_setg(errp, "failed to get flash size"); |
| return; |
| } |
| |
| s->storage = blk_blockalign(s->blk, s->size); |
| |
| if (blk_pread(s->blk, 0, s->storage, s->size) != s->size) { |
| error_setg(errp, "failed to read the initial flash content"); |
| return; |
| } |
| } else { |
| s->storage = blk_blockalign(NULL, s->size); |
| memset(s->storage, 0xFF, s->size); |
| } |
| |
| memory_region_init_io(&s->mmio, OBJECT(s), &pnv_pnor_ops, s, |
| TYPE_PNV_PNOR, s->size); |
| } |
| |
| static Property pnv_pnor_properties[] = { |
| DEFINE_PROP_INT64("size", PnvPnor, size, 128 << 20), |
| DEFINE_PROP_DRIVE("drive", PnvPnor, blk), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void pnv_pnor_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| dc->realize = pnv_pnor_realize; |
| device_class_set_props(dc, pnv_pnor_properties); |
| } |
| |
| static const TypeInfo pnv_pnor_info = { |
| .name = TYPE_PNV_PNOR, |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(PnvPnor), |
| .class_init = pnv_pnor_class_init, |
| }; |
| |
| static void pnv_pnor_register_types(void) |
| { |
| type_register_static(&pnv_pnor_info); |
| } |
| |
| type_init(pnv_pnor_register_types) |