/* * QEMU model of the Xilinx Zynq Devcfg Interface * * (C) 2011 PetaLogix Pty Ltd * (C) 2014 Xilinx Inc. * Written by Peter Crosthwaite * * 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 "qemu/osdep.h" #include "hw/dma/xlnx-zynq-devcfg.h" #include "hw/irq.h" #include "migration/vmstate.h" #include "qemu/bitops.h" #include "sysemu/dma.h" #include "qemu/log.h" #include "qemu/module.h" #define FREQ_HZ 900000000 #define BTT_MAX 0x400 #ifndef XLNX_ZYNQ_DEVCFG_ERR_DEBUG #define XLNX_ZYNQ_DEVCFG_ERR_DEBUG 0 #endif #define DB_PRINT(fmt, args...) do { \ if (XLNX_ZYNQ_DEVCFG_ERR_DEBUG) { \ qemu_log("%s: " fmt, __func__, ## args); \ } \ } while (0) REG32(CTRL, 0x00) FIELD(CTRL, FORCE_RST, 31, 1) /* Not supported, wr ignored */ FIELD(CTRL, PCAP_PR, 27, 1) /* Forced to 0 on bad unlock */ FIELD(CTRL, PCAP_MODE, 26, 1) FIELD(CTRL, MULTIBOOT_EN, 24, 1) FIELD(CTRL, USER_MODE, 15, 1) FIELD(CTRL, PCFG_AES_FUSE, 12, 1) FIELD(CTRL, PCFG_AES_EN, 9, 3) FIELD(CTRL, SEU_EN, 8, 1) FIELD(CTRL, SEC_EN, 7, 1) FIELD(CTRL, SPNIDEN, 6, 1) FIELD(CTRL, SPIDEN, 5, 1) FIELD(CTRL, NIDEN, 4, 1) FIELD(CTRL, DBGEN, 3, 1) FIELD(CTRL, DAP_EN, 0, 3) REG32(LOCK, 0x04) #define AES_FUSE_LOCK 4 #define AES_EN_LOCK 3 #define SEU_LOCK 2 #define SEC_LOCK 1 #define DBG_LOCK 0 /* mapping bits in R_LOCK to what they lock in R_CTRL */ static const uint32_t lock_ctrl_map[] = { [AES_FUSE_LOCK] = R_CTRL_PCFG_AES_FUSE_MASK, [AES_EN_LOCK] = R_CTRL_PCFG_AES_EN_MASK, [SEU_LOCK] = R_CTRL_SEU_EN_MASK, [SEC_LOCK] = R_CTRL_SEC_EN_MASK, [DBG_LOCK] = R_CTRL_SPNIDEN_MASK | R_CTRL_SPIDEN_MASK | R_CTRL_NIDEN_MASK | R_CTRL_DBGEN_MASK | R_CTRL_DAP_EN_MASK, }; REG32(CFG, 0x08) FIELD(CFG, RFIFO_TH, 10, 2) FIELD(CFG, WFIFO_TH, 8, 2) FIELD(CFG, RCLK_EDGE, 7, 1) FIELD(CFG, WCLK_EDGE, 6, 1) FIELD(CFG, DISABLE_SRC_INC, 5, 1) FIELD(CFG, DISABLE_DST_INC, 4, 1) #define R_CFG_RESET 0x50B REG32(INT_STS, 0x0C) FIELD(INT_STS, PSS_GTS_USR_B, 31, 1) FIELD(INT_STS, PSS_FST_CFG_B, 30, 1) FIELD(INT_STS, PSS_CFG_RESET_B, 27, 1) FIELD(INT_STS, RX_FIFO_OV, 18, 1) FIELD(INT_STS, WR_FIFO_LVL, 17, 1) FIELD(INT_STS, RD_FIFO_LVL, 16, 1) FIELD(INT_STS, DMA_CMD_ERR, 15, 1) FIELD(INT_STS, DMA_Q_OV, 14, 1) FIELD(INT_STS, DMA_DONE, 13, 1) FIELD(INT_STS, DMA_P_DONE, 12, 1) FIELD(INT_STS, P2D_LEN_ERR, 11, 1) FIELD(INT_STS, PCFG_DONE, 2, 1) #define R_INT_STS_RSVD ((0x7 << 24) | (0x1 << 19) | (0xF < 7)) REG32(INT_MASK, 0x10) REG32(STATUS, 0x14) FIELD(STATUS, DMA_CMD_Q_F, 31, 1) FIELD(STATUS, DMA_CMD_Q_E, 30, 1) FIELD(STATUS, DMA_DONE_CNT, 28, 2) FIELD(STATUS, RX_FIFO_LVL, 20, 5) FIELD(STATUS, TX_FIFO_LVL, 12, 7) FIELD(STATUS, PSS_GTS_USR_B, 11, 1) FIELD(STATUS, PSS_FST_CFG_B, 10, 1) FIELD(STATUS, PSS_CFG_RESET_B, 5, 1) REG32(DMA_SRC_ADDR, 0x18) REG32(DMA_DST_ADDR, 0x1C) REG32(DMA_SRC_LEN, 0x20) REG32(DMA_DST_LEN, 0x24) REG32(ROM_SHADOW, 0x28) REG32(SW_ID, 0x30) REG32(UNLOCK, 0x34) #define R_UNLOCK_MAGIC 0x757BDF0D REG32(MCTRL, 0x80) FIELD(MCTRL, PS_VERSION, 28, 4) FIELD(MCTRL, PCFG_POR_B, 8, 1) FIELD(MCTRL, INT_PCAP_LPBK, 4, 1) FIELD(MCTRL, QEMU, 3, 1) static void xlnx_zynq_devcfg_update_ixr(XlnxZynqDevcfg *s) { qemu_set_irq(s->irq, ~s->regs[R_INT_MASK] & s->regs[R_INT_STS]); } static void xlnx_zynq_devcfg_reset(DeviceState *dev) { XlnxZynqDevcfg *s = XLNX_ZYNQ_DEVCFG(dev); int i; for (i = 0; i < XLNX_ZYNQ_DEVCFG_R_MAX; ++i) { register_reset(&s->regs_info[i]); } } static void xlnx_zynq_devcfg_dma_go(XlnxZynqDevcfg *s) { do { uint8_t buf[BTT_MAX]; XlnxZynqDevcfgDMACmd *dmah = s->dma_cmd_fifo; uint32_t btt = BTT_MAX; bool loopback = s->regs[R_MCTRL] & R_MCTRL_INT_PCAP_LPBK_MASK; btt = MIN(btt, dmah->src_len); if (loopback) { btt = MIN(btt, dmah->dest_len); } DB_PRINT("reading %x bytes from %x\n", btt, dmah->src_addr); dma_memory_read(&address_space_memory, dmah->src_addr, buf, btt, MEMTXATTRS_UNSPECIFIED); dmah->src_len -= btt; dmah->src_addr += btt; if (loopback && (dmah->src_len || dmah->dest_len)) { DB_PRINT("writing %x bytes from %x\n", btt, dmah->dest_addr); dma_memory_write(&address_space_memory, dmah->dest_addr, buf, btt, MEMTXATTRS_UNSPECIFIED); dmah->dest_len -= btt; dmah->dest_addr += btt; } if (!dmah->src_len && !dmah->dest_len) { DB_PRINT("dma operation finished\n"); s->regs[R_INT_STS] |= R_INT_STS_DMA_DONE_MASK | R_INT_STS_DMA_P_DONE_MASK; s->dma_cmd_fifo_num--; memmove(s->dma_cmd_fifo, &s->dma_cmd_fifo[1], sizeof(s->dma_cmd_fifo) - sizeof(s->dma_cmd_fifo[0])); } xlnx_zynq_devcfg_update_ixr(s); } while (s->dma_cmd_fifo_num); } static void r_ixr_post_write(RegisterInfo *reg, uint64_t val) { XlnxZynqDevcfg *s = XLNX_ZYNQ_DEVCFG(reg->opaque); xlnx_zynq_devcfg_update_ixr(s); } static uint64_t r_ctrl_pre_write(RegisterInfo *reg, uint64_t val) { XlnxZynqDevcfg *s = XLNX_ZYNQ_DEVCFG(reg->opaque); int i; for (i = 0; i < ARRAY_SIZE(lock_ctrl_map); ++i) { if (s->regs[R_LOCK] & 1 << i) { val &= ~lock_ctrl_map[i]; val |= lock_ctrl_map[i] & s->regs[R_CTRL]; } } return val; } static void r_ctrl_post_write(RegisterInfo *reg, uint64_t val) { const char *device_prefix = object_get_typename(OBJECT(reg->opaque)); uint32_t aes_en = FIELD_EX32(val, CTRL, PCFG_AES_EN); if (aes_en != 0 && aes_en != 7) { qemu_log_mask(LOG_UNIMP, "%s: warning, aes-en bits inconsistent," "unimplemented security reset should happen!\n", device_prefix); } } static void r_unlock_post_write(RegisterInfo *reg, uint64_t val) { XlnxZynqDevcfg *s = XLNX_ZYNQ_DEVCFG(reg->opaque); const char *device_prefix = object_get_typename(OBJECT(s)); if (val == R_UNLOCK_MAGIC) { DB_PRINT("successful unlock\n"); s->regs[R_CTRL] |= R_CTRL_PCAP_PR_MASK; s->regs[R_CTRL] |= R_CTRL_PCFG_AES_EN_MASK; memory_region_set_enabled(&s->iomem, true); } else { /* bad unlock attempt */ qemu_log_mask(LOG_GUEST_ERROR, "%s: failed unlock\n", device_prefix); s->regs[R_CTRL] &= ~R_CTRL_PCAP_PR_MASK; s->regs[R_CTRL] &= ~R_CTRL_PCFG_AES_EN_MASK; /* core becomes inaccessible */ memory_region_set_enabled(&s->iomem, false); } } static uint64_t r_lock_pre_write(RegisterInfo *reg, uint64_t val) { XlnxZynqDevcfg *s = XLNX_ZYNQ_DEVCFG(reg->opaque); /* once bits are locked they stay locked */ return s->regs[R_LOCK] | val; } static void r_dma_dst_len_post_write(RegisterInfo *reg, uint64_t val) { XlnxZynqDevcfg *s = XLNX_ZYNQ_DEVCFG(reg->opaque); s->dma_cmd_fifo[s->dma_cmd_fifo_num] = (XlnxZynqDevcfgDMACmd) { .src_addr = s->regs[R_DMA_SRC_ADDR] & ~0x3UL, .dest_addr = s->regs[R_DMA_DST_ADDR] & ~0x3UL, .src_len = s->regs[R_DMA_SRC_LEN] << 2, .dest_len = s->regs[R_DMA_DST_LEN] << 2, }; s->dma_cmd_fifo_num++; DB_PRINT("dma transfer started; %d total transfers pending\n", s->dma_cmd_fifo_num); xlnx_zynq_devcfg_dma_go(s); } static const RegisterAccessInfo xlnx_zynq_devcfg_regs_info[] = { { .name = "CTRL", .addr = A_CTRL, .reset = R_CTRL_PCAP_PR_MASK | R_CTRL_PCAP_MODE_MASK | 0x3 << 13, .rsvd = 0x1 << 28 | 0x3ff << 13 | 0x3 << 13, .pre_write = r_ctrl_pre_write, .post_write = r_ctrl_post_write, }, { .name = "LOCK", .addr = A_LOCK, .rsvd = MAKE_64BIT_MASK(5, 64 - 5), .pre_write = r_lock_pre_write, }, { .name = "CFG", .addr = A_CFG, .reset = R_CFG_RESET, .rsvd = 0xfffff00f, }, { .name = "INT_STS", .addr = A_INT_STS, .w1c = ~R_INT_STS_RSVD, .reset = R_INT_STS_PSS_GTS_USR_B_MASK | R_INT_STS_PSS_CFG_RESET_B_MASK | R_INT_STS_WR_FIFO_LVL_MASK, .rsvd = R_INT_STS_RSVD, .post_write = r_ixr_post_write, }, { .name = "INT_MASK", .addr = A_INT_MASK, .reset = ~0, .rsvd = R_INT_STS_RSVD, .post_write = r_ixr_post_write, }, { .name = "STATUS", .addr = A_STATUS, .reset = R_STATUS_DMA_CMD_Q_E_MASK | R_STATUS_PSS_GTS_USR_B_MASK | R_STATUS_PSS_CFG_RESET_B_MASK, .ro = ~0, }, { .name = "DMA_SRC_ADDR", .addr = A_DMA_SRC_ADDR, }, { .name = "DMA_DST_ADDR", .addr = A_DMA_DST_ADDR, }, { .name = "DMA_SRC_LEN", .addr = A_DMA_SRC_LEN, .ro = MAKE_64BIT_MASK(27, 64 - 27) }, { .name = "DMA_DST_LEN", .addr = A_DMA_DST_LEN, .ro = MAKE_64BIT_MASK(27, 64 - 27), .post_write = r_dma_dst_len_post_write, }, { .name = "ROM_SHADOW", .addr = A_ROM_SHADOW, .rsvd = ~0ull, }, { .name = "SW_ID", .addr = A_SW_ID, }, { .name = "UNLOCK", .addr = A_UNLOCK, .post_write = r_unlock_post_write, }, { .name = "MCTRL", .addr = R_MCTRL * 4, /* Silicon 3.0 for version field, the mysterious reserved bit 23 * and QEMU platform identifier. */ .reset = 0x2 << R_MCTRL_PS_VERSION_SHIFT | 1 << 23 | R_MCTRL_QEMU_MASK, .ro = ~R_MCTRL_INT_PCAP_LPBK_MASK, .rsvd = 0x00f00303, }, }; static const MemoryRegionOps xlnx_zynq_devcfg_reg_ops = { .read = register_read_memory, .write = register_write_memory, .endianness = DEVICE_LITTLE_ENDIAN, .valid = { .min_access_size = 4, .max_access_size = 4, } }; static const VMStateDescription vmstate_xlnx_zynq_devcfg_dma_cmd = { .name = "xlnx_zynq_devcfg_dma_cmd", .version_id = 1, .minimum_version_id = 1, .fields = (const VMStateField[]) { VMSTATE_UINT32(src_addr, XlnxZynqDevcfgDMACmd), VMSTATE_UINT32(dest_addr, XlnxZynqDevcfgDMACmd), VMSTATE_UINT32(src_len, XlnxZynqDevcfgDMACmd), VMSTATE_UINT32(dest_len, XlnxZynqDevcfgDMACmd), VMSTATE_END_OF_LIST() } }; static const VMStateDescription vmstate_xlnx_zynq_devcfg = { .name = "xlnx_zynq_devcfg", .version_id = 1, .minimum_version_id = 1, .fields = (const VMStateField[]) { VMSTATE_STRUCT_ARRAY(dma_cmd_fifo, XlnxZynqDevcfg, XLNX_ZYNQ_DEVCFG_DMA_CMD_FIFO_LEN, 0, vmstate_xlnx_zynq_devcfg_dma_cmd, XlnxZynqDevcfgDMACmd), VMSTATE_UINT8(dma_cmd_fifo_num, XlnxZynqDevcfg), VMSTATE_UINT32_ARRAY(regs, XlnxZynqDevcfg, XLNX_ZYNQ_DEVCFG_R_MAX), VMSTATE_END_OF_LIST() } }; static void xlnx_zynq_devcfg_init(Object *obj) { SysBusDevice *sbd = SYS_BUS_DEVICE(obj); XlnxZynqDevcfg *s = XLNX_ZYNQ_DEVCFG(obj); RegisterInfoArray *reg_array; sysbus_init_irq(sbd, &s->irq); memory_region_init(&s->iomem, obj, "devcfg", XLNX_ZYNQ_DEVCFG_R_MAX * 4); reg_array = register_init_block32(DEVICE(obj), xlnx_zynq_devcfg_regs_info, ARRAY_SIZE(xlnx_zynq_devcfg_regs_info), s->regs_info, s->regs, &xlnx_zynq_devcfg_reg_ops, XLNX_ZYNQ_DEVCFG_ERR_DEBUG, XLNX_ZYNQ_DEVCFG_R_MAX); memory_region_add_subregion(&s->iomem, A_CTRL, ®_array->mem); sysbus_init_mmio(sbd, &s->iomem); } static void xlnx_zynq_devcfg_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); device_class_set_legacy_reset(dc, xlnx_zynq_devcfg_reset); dc->vmsd = &vmstate_xlnx_zynq_devcfg; } static const TypeInfo xlnx_zynq_devcfg_info = { .name = TYPE_XLNX_ZYNQ_DEVCFG, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(XlnxZynqDevcfg), .instance_init = xlnx_zynq_devcfg_init, .class_init = xlnx_zynq_devcfg_class_init, }; static void xlnx_zynq_devcfg_register_types(void) { type_register_static(&xlnx_zynq_devcfg_info); } type_init(xlnx_zynq_devcfg_register_types)