| /* |
| * ARM PrimeCell PL330 DMA Controller |
| * |
| * Copyright (c) 2009 Samsung Electronics. |
| * Contributed by Kirill Batuzov <batuzovk@ispras.ru> |
| * Copyright (c) 2012 Peter A.G. Crosthwaite (peter.crosthwaite@petalogix.com) |
| * Copyright (c) 2012 PetaLogix Pty Ltd. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; version 2 or later. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "hw/sysbus.h" |
| #include "qemu/timer.h" |
| #include "sysemu/dma.h" |
| |
| #ifndef PL330_ERR_DEBUG |
| #define PL330_ERR_DEBUG 0 |
| #endif |
| |
| #define DB_PRINT_L(lvl, fmt, args...) do {\ |
| if (PL330_ERR_DEBUG >= lvl) {\ |
| fprintf(stderr, "PL330: %s:" fmt, __func__, ## args);\ |
| } \ |
| } while (0); |
| |
| #define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args) |
| |
| #define PL330_PERIPH_NUM 32 |
| #define PL330_MAX_BURST_LEN 128 |
| #define PL330_INSN_MAXSIZE 6 |
| |
| #define PL330_FIFO_OK 0 |
| #define PL330_FIFO_STALL 1 |
| #define PL330_FIFO_ERR (-1) |
| |
| #define PL330_FAULT_UNDEF_INSTR (1 << 0) |
| #define PL330_FAULT_OPERAND_INVALID (1 << 1) |
| #define PL330_FAULT_DMAGO_ERR (1 << 4) |
| #define PL330_FAULT_EVENT_ERR (1 << 5) |
| #define PL330_FAULT_CH_PERIPH_ERR (1 << 6) |
| #define PL330_FAULT_CH_RDWR_ERR (1 << 7) |
| #define PL330_FAULT_ST_DATA_UNAVAILABLE (1 << 12) |
| #define PL330_FAULT_FIFOEMPTY_ERR (1 << 13) |
| #define PL330_FAULT_INSTR_FETCH_ERR (1 << 16) |
| #define PL330_FAULT_DATA_WRITE_ERR (1 << 17) |
| #define PL330_FAULT_DATA_READ_ERR (1 << 18) |
| #define PL330_FAULT_DBG_INSTR (1 << 30) |
| #define PL330_FAULT_LOCKUP_ERR (1 << 31) |
| |
| #define PL330_UNTAGGED 0xff |
| |
| #define PL330_SINGLE 0x0 |
| #define PL330_BURST 0x1 |
| |
| #define PL330_WATCHDOG_LIMIT 1024 |
| |
| /* IOMEM mapped registers */ |
| #define PL330_REG_DSR 0x000 |
| #define PL330_REG_DPC 0x004 |
| #define PL330_REG_INTEN 0x020 |
| #define PL330_REG_INT_EVENT_RIS 0x024 |
| #define PL330_REG_INTMIS 0x028 |
| #define PL330_REG_INTCLR 0x02C |
| #define PL330_REG_FSRD 0x030 |
| #define PL330_REG_FSRC 0x034 |
| #define PL330_REG_FTRD 0x038 |
| #define PL330_REG_FTR_BASE 0x040 |
| #define PL330_REG_CSR_BASE 0x100 |
| #define PL330_REG_CPC_BASE 0x104 |
| #define PL330_REG_CHANCTRL 0x400 |
| #define PL330_REG_DBGSTATUS 0xD00 |
| #define PL330_REG_DBGCMD 0xD04 |
| #define PL330_REG_DBGINST0 0xD08 |
| #define PL330_REG_DBGINST1 0xD0C |
| #define PL330_REG_CR0_BASE 0xE00 |
| #define PL330_REG_PERIPH_ID 0xFE0 |
| |
| #define PL330_IOMEM_SIZE 0x1000 |
| |
| #define CFG_BOOT_ADDR 2 |
| #define CFG_INS 3 |
| #define CFG_PNS 4 |
| #define CFG_CRD 5 |
| |
| static const uint32_t pl330_id[] = { |
| 0x30, 0x13, 0x24, 0x00, 0x0D, 0xF0, 0x05, 0xB1 |
| }; |
| |
| /* DMA channel states as they are described in PL330 Technical Reference Manual |
| * Most of them will not be used in emulation. |
| */ |
| typedef enum { |
| pl330_chan_stopped = 0, |
| pl330_chan_executing = 1, |
| pl330_chan_cache_miss = 2, |
| pl330_chan_updating_pc = 3, |
| pl330_chan_waiting_event = 4, |
| pl330_chan_at_barrier = 5, |
| pl330_chan_queue_busy = 6, |
| pl330_chan_waiting_periph = 7, |
| pl330_chan_killing = 8, |
| pl330_chan_completing = 9, |
| pl330_chan_fault_completing = 14, |
| pl330_chan_fault = 15, |
| } PL330ChanState; |
| |
| typedef struct PL330State PL330State; |
| |
| typedef struct PL330Chan { |
| uint32_t src; |
| uint32_t dst; |
| uint32_t pc; |
| uint32_t control; |
| uint32_t status; |
| uint32_t lc[2]; |
| uint32_t fault_type; |
| uint32_t watchdog_timer; |
| |
| bool ns; |
| uint8_t request_flag; |
| uint8_t wakeup; |
| uint8_t wfp_sbp; |
| |
| uint8_t state; |
| uint8_t stall; |
| |
| bool is_manager; |
| PL330State *parent; |
| uint8_t tag; |
| } PL330Chan; |
| |
| static const VMStateDescription vmstate_pl330_chan = { |
| .name = "pl330_chan", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(src, PL330Chan), |
| VMSTATE_UINT32(dst, PL330Chan), |
| VMSTATE_UINT32(pc, PL330Chan), |
| VMSTATE_UINT32(control, PL330Chan), |
| VMSTATE_UINT32(status, PL330Chan), |
| VMSTATE_UINT32_ARRAY(lc, PL330Chan, 2), |
| VMSTATE_UINT32(fault_type, PL330Chan), |
| VMSTATE_UINT32(watchdog_timer, PL330Chan), |
| VMSTATE_BOOL(ns, PL330Chan), |
| VMSTATE_UINT8(request_flag, PL330Chan), |
| VMSTATE_UINT8(wakeup, PL330Chan), |
| VMSTATE_UINT8(wfp_sbp, PL330Chan), |
| VMSTATE_UINT8(state, PL330Chan), |
| VMSTATE_UINT8(stall, PL330Chan), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| typedef struct PL330Fifo { |
| uint8_t *buf; |
| uint8_t *tag; |
| uint32_t head; |
| uint32_t num; |
| uint32_t buf_size; |
| } PL330Fifo; |
| |
| static const VMStateDescription vmstate_pl330_fifo = { |
| .name = "pl330_chan", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_VBUFFER_UINT32(buf, PL330Fifo, 1, NULL, 0, buf_size), |
| VMSTATE_VBUFFER_UINT32(tag, PL330Fifo, 1, NULL, 0, buf_size), |
| VMSTATE_UINT32(head, PL330Fifo), |
| VMSTATE_UINT32(num, PL330Fifo), |
| VMSTATE_UINT32(buf_size, PL330Fifo), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| typedef struct PL330QueueEntry { |
| uint32_t addr; |
| uint32_t len; |
| uint8_t n; |
| bool inc; |
| bool z; |
| uint8_t tag; |
| uint8_t seqn; |
| } PL330QueueEntry; |
| |
| static const VMStateDescription vmstate_pl330_queue_entry = { |
| .name = "pl330_queue_entry", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(addr, PL330QueueEntry), |
| VMSTATE_UINT32(len, PL330QueueEntry), |
| VMSTATE_UINT8(n, PL330QueueEntry), |
| VMSTATE_BOOL(inc, PL330QueueEntry), |
| VMSTATE_BOOL(z, PL330QueueEntry), |
| VMSTATE_UINT8(tag, PL330QueueEntry), |
| VMSTATE_UINT8(seqn, PL330QueueEntry), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| typedef struct PL330Queue { |
| PL330State *parent; |
| PL330QueueEntry *queue; |
| uint32_t queue_size; |
| } PL330Queue; |
| |
| static const VMStateDescription vmstate_pl330_queue = { |
| .name = "pl330_queue", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_STRUCT_VARRAY_UINT32(queue, PL330Queue, queue_size, 1, |
| vmstate_pl330_queue_entry, PL330QueueEntry), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| struct PL330State { |
| SysBusDevice parent_obj; |
| |
| MemoryRegion iomem; |
| qemu_irq irq_abort; |
| qemu_irq *irq; |
| |
| /* Config registers. cfg[5] = CfgDn. */ |
| uint32_t cfg[6]; |
| #define EVENT_SEC_STATE 3 |
| #define PERIPH_SEC_STATE 4 |
| /* cfg 0 bits and pieces */ |
| uint32_t num_chnls; |
| uint8_t num_periph_req; |
| uint8_t num_events; |
| uint8_t mgr_ns_at_rst; |
| /* cfg 1 bits and pieces */ |
| uint8_t i_cache_len; |
| uint8_t num_i_cache_lines; |
| /* CRD bits and pieces */ |
| uint8_t data_width; |
| uint8_t wr_cap; |
| uint8_t wr_q_dep; |
| uint8_t rd_cap; |
| uint8_t rd_q_dep; |
| uint16_t data_buffer_dep; |
| |
| PL330Chan manager; |
| PL330Chan *chan; |
| PL330Fifo fifo; |
| PL330Queue read_queue; |
| PL330Queue write_queue; |
| uint8_t *lo_seqn; |
| uint8_t *hi_seqn; |
| QEMUTimer *timer; /* is used for restore dma. */ |
| |
| uint32_t inten; |
| uint32_t int_status; |
| uint32_t ev_status; |
| uint32_t dbg[2]; |
| uint8_t debug_status; |
| uint8_t num_faulting; |
| uint8_t periph_busy[PL330_PERIPH_NUM]; |
| |
| }; |
| |
| #define TYPE_PL330 "pl330" |
| #define PL330(obj) OBJECT_CHECK(PL330State, (obj), TYPE_PL330) |
| |
| static const VMStateDescription vmstate_pl330 = { |
| .name = "pl330", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_STRUCT(manager, PL330State, 0, vmstate_pl330_chan, PL330Chan), |
| VMSTATE_STRUCT_VARRAY_UINT32(chan, PL330State, num_chnls, 0, |
| vmstate_pl330_chan, PL330Chan), |
| VMSTATE_VBUFFER_UINT32(lo_seqn, PL330State, 1, NULL, 0, num_chnls), |
| VMSTATE_VBUFFER_UINT32(hi_seqn, PL330State, 1, NULL, 0, num_chnls), |
| VMSTATE_STRUCT(fifo, PL330State, 0, vmstate_pl330_fifo, PL330Fifo), |
| VMSTATE_STRUCT(read_queue, PL330State, 0, vmstate_pl330_queue, |
| PL330Queue), |
| VMSTATE_STRUCT(write_queue, PL330State, 0, vmstate_pl330_queue, |
| PL330Queue), |
| VMSTATE_TIMER(timer, PL330State), |
| VMSTATE_UINT32(inten, PL330State), |
| VMSTATE_UINT32(int_status, PL330State), |
| VMSTATE_UINT32(ev_status, PL330State), |
| VMSTATE_UINT32_ARRAY(dbg, PL330State, 2), |
| VMSTATE_UINT8(debug_status, PL330State), |
| VMSTATE_UINT8(num_faulting, PL330State), |
| VMSTATE_UINT8_ARRAY(periph_busy, PL330State, PL330_PERIPH_NUM), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| typedef struct PL330InsnDesc { |
| /* OPCODE of the instruction */ |
| uint8_t opcode; |
| /* Mask so we can select several sibling instructions, such as |
| DMALD, DMALDS and DMALDB */ |
| uint8_t opmask; |
| /* Size of instruction in bytes */ |
| uint8_t size; |
| /* Interpreter */ |
| void (*exec)(PL330Chan *, uint8_t opcode, uint8_t *args, int len); |
| } PL330InsnDesc; |
| |
| |
| /* MFIFO Implementation |
| * |
| * MFIFO is implemented as a cyclic buffer of BUF_SIZE size. Tagged bytes are |
| * stored in this buffer. Data is stored in BUF field, tags - in the |
| * corresponding array elements of TAG field. |
| */ |
| |
| /* Initialize queue. */ |
| |
| static void pl330_fifo_init(PL330Fifo *s, uint32_t size) |
| { |
| s->buf = g_malloc0(size); |
| s->tag = g_malloc0(size); |
| s->buf_size = size; |
| } |
| |
| /* Cyclic increment */ |
| |
| static inline int pl330_fifo_inc(PL330Fifo *s, int x) |
| { |
| return (x + 1) % s->buf_size; |
| } |
| |
| /* Number of empty bytes in MFIFO */ |
| |
| static inline int pl330_fifo_num_free(PL330Fifo *s) |
| { |
| return s->buf_size - s->num; |
| } |
| |
| /* Push LEN bytes of data stored in BUF to MFIFO and tag it with TAG. |
| * Zero returned on success, PL330_FIFO_STALL if there is no enough free |
| * space in MFIFO to store requested amount of data. If push was unsuccessful |
| * no data is stored to MFIFO. |
| */ |
| |
| static int pl330_fifo_push(PL330Fifo *s, uint8_t *buf, int len, uint8_t tag) |
| { |
| int i; |
| |
| if (s->buf_size - s->num < len) { |
| return PL330_FIFO_STALL; |
| } |
| for (i = 0; i < len; i++) { |
| int push_idx = (s->head + s->num + i) % s->buf_size; |
| s->buf[push_idx] = buf[i]; |
| s->tag[push_idx] = tag; |
| } |
| s->num += len; |
| return PL330_FIFO_OK; |
| } |
| |
| /* Get LEN bytes of data from MFIFO and store it to BUF. Tag value of each |
| * byte is verified. Zero returned on success, PL330_FIFO_ERR on tag mismatch |
| * and PL330_FIFO_STALL if there is no enough data in MFIFO. If get was |
| * unsuccessful no data is removed from MFIFO. |
| */ |
| |
| static int pl330_fifo_get(PL330Fifo *s, uint8_t *buf, int len, uint8_t tag) |
| { |
| int i; |
| |
| if (s->num < len) { |
| return PL330_FIFO_STALL; |
| } |
| for (i = 0; i < len; i++) { |
| if (s->tag[s->head] == tag) { |
| int get_idx = (s->head + i) % s->buf_size; |
| buf[i] = s->buf[get_idx]; |
| } else { /* Tag mismatch - Rollback transaction */ |
| return PL330_FIFO_ERR; |
| } |
| } |
| s->head = (s->head + len) % s->buf_size; |
| s->num -= len; |
| return PL330_FIFO_OK; |
| } |
| |
| /* Reset MFIFO. This completely erases all data in it. */ |
| |
| static inline void pl330_fifo_reset(PL330Fifo *s) |
| { |
| s->head = 0; |
| s->num = 0; |
| } |
| |
| /* Return tag of the first byte stored in MFIFO. If MFIFO is empty |
| * PL330_UNTAGGED is returned. |
| */ |
| |
| static inline uint8_t pl330_fifo_tag(PL330Fifo *s) |
| { |
| return (!s->num) ? PL330_UNTAGGED : s->tag[s->head]; |
| } |
| |
| /* Returns non-zero if tag TAG is present in fifo or zero otherwise */ |
| |
| static int pl330_fifo_has_tag(PL330Fifo *s, uint8_t tag) |
| { |
| int i, n; |
| |
| i = s->head; |
| for (n = 0; n < s->num; n++) { |
| if (s->tag[i] == tag) { |
| return 1; |
| } |
| i = pl330_fifo_inc(s, i); |
| } |
| return 0; |
| } |
| |
| /* Remove all entry tagged with TAG from MFIFO */ |
| |
| static void pl330_fifo_tagged_remove(PL330Fifo *s, uint8_t tag) |
| { |
| int i, t, n; |
| |
| t = i = s->head; |
| for (n = 0; n < s->num; n++) { |
| if (s->tag[i] != tag) { |
| s->buf[t] = s->buf[i]; |
| s->tag[t] = s->tag[i]; |
| t = pl330_fifo_inc(s, t); |
| } else { |
| s->num = s->num - 1; |
| } |
| i = pl330_fifo_inc(s, i); |
| } |
| } |
| |
| /* Read-Write Queue implementation |
| * |
| * A Read-Write Queue stores up to QUEUE_SIZE instructions (loads or stores). |
| * Each instruction is described by source (for loads) or destination (for |
| * stores) address ADDR, width of data to be loaded/stored LEN, number of |
| * stores/loads to be performed N, INC bit, Z bit and TAG to identify channel |
| * this instruction belongs to. Queue does not store any information about |
| * nature of the instruction: is it load or store. PL330 has different queues |
| * for loads and stores so this is already known at the top level where it |
| * matters. |
| * |
| * Queue works as FIFO for instructions with equivalent tags, but can issue |
| * instructions with different tags in arbitrary order. SEQN field attached to |
| * each instruction helps to achieve this. For each TAG queue contains |
| * instructions with consecutive SEQN values ranging from LO_SEQN[TAG] to |
| * HI_SEQN[TAG]-1 inclusive. SEQN is 8-bit unsigned integer, so SEQN=255 is |
| * followed by SEQN=0. |
| * |
| * Z bit indicates that zeroes should be stored. No MFIFO fetches are performed |
| * in this case. |
| */ |
| |
| static void pl330_queue_reset(PL330Queue *s) |
| { |
| int i; |
| |
| for (i = 0; i < s->queue_size; i++) { |
| s->queue[i].tag = PL330_UNTAGGED; |
| } |
| } |
| |
| /* Initialize queue */ |
| static void pl330_queue_init(PL330Queue *s, int size, PL330State *parent) |
| { |
| s->parent = parent; |
| s->queue = g_new0(PL330QueueEntry, size); |
| s->queue_size = size; |
| } |
| |
| /* Returns pointer to an empty slot or NULL if queue is full */ |
| static PL330QueueEntry *pl330_queue_find_empty(PL330Queue *s) |
| { |
| int i; |
| |
| for (i = 0; i < s->queue_size; i++) { |
| if (s->queue[i].tag == PL330_UNTAGGED) { |
| return &s->queue[i]; |
| } |
| } |
| return NULL; |
| } |
| |
| /* Put instruction in queue. |
| * Return value: |
| * - zero - OK |
| * - non-zero - queue is full |
| */ |
| |
| static int pl330_queue_put_insn(PL330Queue *s, uint32_t addr, |
| int len, int n, bool inc, bool z, uint8_t tag) |
| { |
| PL330QueueEntry *entry = pl330_queue_find_empty(s); |
| |
| if (!entry) { |
| return 1; |
| } |
| entry->tag = tag; |
| entry->addr = addr; |
| entry->len = len; |
| entry->n = n; |
| entry->z = z; |
| entry->inc = inc; |
| entry->seqn = s->parent->hi_seqn[tag]; |
| s->parent->hi_seqn[tag]++; |
| return 0; |
| } |
| |
| /* Returns a pointer to queue slot containing instruction which satisfies |
| * following conditions: |
| * - it has valid tag value (not PL330_UNTAGGED) |
| * - if enforce_seq is set it has to be issuable without violating queue |
| * logic (see above) |
| * - if TAG argument is not PL330_UNTAGGED this instruction has tag value |
| * equivalent to the argument TAG value. |
| * If such instruction cannot be found NULL is returned. |
| */ |
| |
| static PL330QueueEntry *pl330_queue_find_insn(PL330Queue *s, uint8_t tag, |
| bool enforce_seq) |
| { |
| int i; |
| |
| for (i = 0; i < s->queue_size; i++) { |
| if (s->queue[i].tag != PL330_UNTAGGED) { |
| if ((!enforce_seq || |
| s->queue[i].seqn == s->parent->lo_seqn[s->queue[i].tag]) && |
| (s->queue[i].tag == tag || tag == PL330_UNTAGGED || |
| s->queue[i].z)) { |
| return &s->queue[i]; |
| } |
| } |
| } |
| return NULL; |
| } |
| |
| /* Removes instruction from queue. */ |
| |
| static inline void pl330_queue_remove_insn(PL330Queue *s, PL330QueueEntry *e) |
| { |
| s->parent->lo_seqn[e->tag]++; |
| e->tag = PL330_UNTAGGED; |
| } |
| |
| /* Removes all instructions tagged with TAG from queue. */ |
| |
| static inline void pl330_queue_remove_tagged(PL330Queue *s, uint8_t tag) |
| { |
| int i; |
| |
| for (i = 0; i < s->queue_size; i++) { |
| if (s->queue[i].tag == tag) { |
| s->queue[i].tag = PL330_UNTAGGED; |
| } |
| } |
| } |
| |
| /* DMA instruction execution engine */ |
| |
| /* Moves DMA channel to the FAULT state and updates it's status. */ |
| |
| static inline void pl330_fault(PL330Chan *ch, uint32_t flags) |
| { |
| DB_PRINT("ch: %p, flags: %" PRIx32 "\n", ch, flags); |
| ch->fault_type |= flags; |
| if (ch->state == pl330_chan_fault) { |
| return; |
| } |
| ch->state = pl330_chan_fault; |
| ch->parent->num_faulting++; |
| if (ch->parent->num_faulting == 1) { |
| DB_PRINT("abort interrupt raised\n"); |
| qemu_irq_raise(ch->parent->irq_abort); |
| } |
| } |
| |
| /* |
| * For information about instructions see PL330 Technical Reference Manual. |
| * |
| * Arguments: |
| * CH - channel executing the instruction |
| * OPCODE - opcode |
| * ARGS - array of 8-bit arguments |
| * LEN - number of elements in ARGS array |
| */ |
| |
| static void pl330_dmaadxh(PL330Chan *ch, uint8_t *args, bool ra, bool neg) |
| { |
| uint32_t im = (args[1] << 8) | args[0]; |
| if (neg) { |
| im |= 0xffffu << 16; |
| } |
| |
| if (ch->is_manager) { |
| pl330_fault(ch, PL330_FAULT_UNDEF_INSTR); |
| return; |
| } |
| if (ra) { |
| ch->dst += im; |
| } else { |
| ch->src += im; |
| } |
| } |
| |
| static void pl330_dmaaddh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| pl330_dmaadxh(ch, args, extract32(opcode, 1, 1), false); |
| } |
| |
| static void pl330_dmaadnh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| pl330_dmaadxh(ch, args, extract32(opcode, 1, 1), true); |
| } |
| |
| static void pl330_dmaend(PL330Chan *ch, uint8_t opcode, |
| uint8_t *args, int len) |
| { |
| PL330State *s = ch->parent; |
| |
| if (ch->state == pl330_chan_executing && !ch->is_manager) { |
| /* Wait for all transfers to complete */ |
| if (pl330_fifo_has_tag(&s->fifo, ch->tag) || |
| pl330_queue_find_insn(&s->read_queue, ch->tag, false) != NULL || |
| pl330_queue_find_insn(&s->write_queue, ch->tag, false) != NULL) { |
| |
| ch->stall = 1; |
| return; |
| } |
| } |
| DB_PRINT("DMA ending!\n"); |
| pl330_fifo_tagged_remove(&s->fifo, ch->tag); |
| pl330_queue_remove_tagged(&s->read_queue, ch->tag); |
| pl330_queue_remove_tagged(&s->write_queue, ch->tag); |
| ch->state = pl330_chan_stopped; |
| } |
| |
| static void pl330_dmaflushp(PL330Chan *ch, uint8_t opcode, |
| uint8_t *args, int len) |
| { |
| uint8_t periph_id; |
| |
| if (args[0] & 7) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| periph_id = (args[0] >> 3) & 0x1f; |
| if (periph_id >= ch->parent->num_periph_req) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { |
| pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); |
| return; |
| } |
| /* Do nothing */ |
| } |
| |
| static void pl330_dmago(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| uint8_t chan_id; |
| uint8_t ns; |
| uint32_t pc; |
| PL330Chan *s; |
| |
| DB_PRINT("\n"); |
| |
| if (!ch->is_manager) { |
| pl330_fault(ch, PL330_FAULT_UNDEF_INSTR); |
| return; |
| } |
| ns = !!(opcode & 2); |
| chan_id = args[0] & 7; |
| if ((args[0] >> 3)) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if (chan_id >= ch->parent->num_chnls) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| pc = (((uint32_t)args[4]) << 24) | (((uint32_t)args[3]) << 16) | |
| (((uint32_t)args[2]) << 8) | (((uint32_t)args[1])); |
| if (ch->parent->chan[chan_id].state != pl330_chan_stopped) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if (ch->ns && !ns) { |
| pl330_fault(ch, PL330_FAULT_DMAGO_ERR); |
| return; |
| } |
| s = &ch->parent->chan[chan_id]; |
| s->ns = ns; |
| s->pc = pc; |
| s->state = pl330_chan_executing; |
| } |
| |
| static void pl330_dmald(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| uint8_t bs = opcode & 3; |
| uint32_t size, num; |
| bool inc; |
| |
| if (bs == 2) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if ((bs == 1 && ch->request_flag == PL330_BURST) || |
| (bs == 3 && ch->request_flag == PL330_SINGLE)) { |
| /* Perform NOP */ |
| return; |
| } |
| if (bs == 1 && ch->request_flag == PL330_SINGLE) { |
| num = 1; |
| } else { |
| num = ((ch->control >> 4) & 0xf) + 1; |
| } |
| size = (uint32_t)1 << ((ch->control >> 1) & 0x7); |
| inc = !!(ch->control & 1); |
| ch->stall = pl330_queue_put_insn(&ch->parent->read_queue, ch->src, |
| size, num, inc, 0, ch->tag); |
| if (!ch->stall) { |
| DB_PRINT("channel:%" PRId8 " address:%08" PRIx32 " size:%" PRIx32 |
| " num:%" PRId32 " %c\n", |
| ch->tag, ch->src, size, num, inc ? 'Y' : 'N'); |
| ch->src += inc ? size * num - (ch->src & (size - 1)) : 0; |
| } |
| } |
| |
| static void pl330_dmaldp(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| uint8_t periph_id; |
| |
| if (args[0] & 7) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| periph_id = (args[0] >> 3) & 0x1f; |
| if (periph_id >= ch->parent->num_periph_req) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { |
| pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); |
| return; |
| } |
| pl330_dmald(ch, opcode, args, len); |
| } |
| |
| static void pl330_dmalp(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| uint8_t lc = (opcode & 2) >> 1; |
| |
| ch->lc[lc] = args[0]; |
| } |
| |
| static void pl330_dmakill(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| if (ch->state == pl330_chan_fault || |
| ch->state == pl330_chan_fault_completing) { |
| /* This is the only way for a channel to leave the faulting state */ |
| ch->fault_type = 0; |
| ch->parent->num_faulting--; |
| if (ch->parent->num_faulting == 0) { |
| DB_PRINT("abort interrupt lowered\n"); |
| qemu_irq_lower(ch->parent->irq_abort); |
| } |
| } |
| ch->state = pl330_chan_killing; |
| pl330_fifo_tagged_remove(&ch->parent->fifo, ch->tag); |
| pl330_queue_remove_tagged(&ch->parent->read_queue, ch->tag); |
| pl330_queue_remove_tagged(&ch->parent->write_queue, ch->tag); |
| ch->state = pl330_chan_stopped; |
| } |
| |
| static void pl330_dmalpend(PL330Chan *ch, uint8_t opcode, |
| uint8_t *args, int len) |
| { |
| uint8_t nf = (opcode & 0x10) >> 4; |
| uint8_t bs = opcode & 3; |
| uint8_t lc = (opcode & 4) >> 2; |
| |
| if (bs == 2) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if ((bs == 1 && ch->request_flag == PL330_BURST) || |
| (bs == 3 && ch->request_flag == PL330_SINGLE)) { |
| /* Perform NOP */ |
| return; |
| } |
| if (!nf || ch->lc[lc]) { |
| if (nf) { |
| ch->lc[lc]--; |
| } |
| DB_PRINT("loop reiteration\n"); |
| ch->pc -= args[0]; |
| ch->pc -= len + 1; |
| /* "ch->pc -= args[0] + len + 1" is incorrect when args[0] == 256 */ |
| } else { |
| DB_PRINT("loop fallthrough\n"); |
| } |
| } |
| |
| |
| static void pl330_dmamov(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| uint8_t rd = args[0] & 7; |
| uint32_t im; |
| |
| if ((args[0] >> 3)) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| im = (((uint32_t)args[4]) << 24) | (((uint32_t)args[3]) << 16) | |
| (((uint32_t)args[2]) << 8) | (((uint32_t)args[1])); |
| switch (rd) { |
| case 0: |
| ch->src = im; |
| break; |
| case 1: |
| ch->control = im; |
| break; |
| case 2: |
| ch->dst = im; |
| break; |
| default: |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| } |
| |
| static void pl330_dmanop(PL330Chan *ch, uint8_t opcode, |
| uint8_t *args, int len) |
| { |
| /* NOP is NOP. */ |
| } |
| |
| static void pl330_dmarmb(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| if (pl330_queue_find_insn(&ch->parent->read_queue, ch->tag, false)) { |
| ch->state = pl330_chan_at_barrier; |
| ch->stall = 1; |
| return; |
| } else { |
| ch->state = pl330_chan_executing; |
| } |
| } |
| |
| static void pl330_dmasev(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| uint8_t ev_id; |
| |
| if (args[0] & 7) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| ev_id = (args[0] >> 3) & 0x1f; |
| if (ev_id >= ch->parent->num_events) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if (ch->ns && !(ch->parent->cfg[CFG_INS] & (1 << ev_id))) { |
| pl330_fault(ch, PL330_FAULT_EVENT_ERR); |
| return; |
| } |
| if (ch->parent->inten & (1 << ev_id)) { |
| ch->parent->int_status |= (1 << ev_id); |
| DB_PRINT("event interrupt raised %" PRId8 "\n", ev_id); |
| qemu_irq_raise(ch->parent->irq[ev_id]); |
| } |
| DB_PRINT("event raised %" PRId8 "\n", ev_id); |
| ch->parent->ev_status |= (1 << ev_id); |
| } |
| |
| static void pl330_dmast(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) |
| { |
| uint8_t bs = opcode & 3; |
| uint32_t size, num; |
| bool inc; |
| |
| if (bs == 2) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if ((bs == 1 && ch->request_flag == PL330_BURST) || |
| (bs == 3 && ch->request_flag == PL330_SINGLE)) { |
| /* Perform NOP */ |
| return; |
| } |
| num = ((ch->control >> 18) & 0xf) + 1; |
| size = (uint32_t)1 << ((ch->control >> 15) & 0x7); |
| inc = !!((ch->control >> 14) & 1); |
| ch->stall = pl330_queue_put_insn(&ch->parent->write_queue, ch->dst, |
| size, num, inc, 0, ch->tag); |
| if (!ch->stall) { |
| DB_PRINT("channel:%" PRId8 " address:%08" PRIx32 " size:%" PRIx32 |
| " num:%" PRId32 " %c\n", |
| ch->tag, ch->dst, size, num, inc ? 'Y' : 'N'); |
| ch->dst += inc ? size * num - (ch->dst & (size - 1)) : 0; |
| } |
| } |
| |
| static void pl330_dmastp(PL330Chan *ch, uint8_t opcode, |
| uint8_t *args, int len) |
| { |
| uint8_t periph_id; |
| |
| if (args[0] & 7) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| periph_id = (args[0] >> 3) & 0x1f; |
| if (periph_id >= ch->parent->num_periph_req) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { |
| pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); |
| return; |
| } |
| pl330_dmast(ch, opcode, args, len); |
| } |
| |
| static void pl330_dmastz(PL330Chan *ch, uint8_t opcode, |
| uint8_t *args, int len) |
| { |
| uint32_t size, num; |
| bool inc; |
| |
| num = ((ch->control >> 18) & 0xf) + 1; |
| size = (uint32_t)1 << ((ch->control >> 15) & 0x7); |
| inc = !!((ch->control >> 14) & 1); |
| ch->stall = pl330_queue_put_insn(&ch->parent->write_queue, ch->dst, |
| size, num, inc, 1, ch->tag); |
| if (inc) { |
| ch->dst += size * num; |
| } |
| } |
| |
| static void pl330_dmawfe(PL330Chan *ch, uint8_t opcode, |
| uint8_t *args, int len) |
| { |
| uint8_t ev_id; |
| int i; |
| |
| if (args[0] & 5) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| ev_id = (args[0] >> 3) & 0x1f; |
| if (ev_id >= ch->parent->num_events) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if (ch->ns && !(ch->parent->cfg[CFG_INS] & (1 << ev_id))) { |
| pl330_fault(ch, PL330_FAULT_EVENT_ERR); |
| return; |
| } |
| ch->wakeup = ev_id; |
| ch->state = pl330_chan_waiting_event; |
| if (~ch->parent->inten & ch->parent->ev_status & 1 << ev_id) { |
| ch->state = pl330_chan_executing; |
| /* If anyone else is currently waiting on the same event, let them |
| * clear the ev_status so they pick up event as well |
| */ |
| for (i = 0; i < ch->parent->num_chnls; ++i) { |
| PL330Chan *peer = &ch->parent->chan[i]; |
| if (peer->state == pl330_chan_waiting_event && |
| peer->wakeup == ev_id) { |
| return; |
| } |
| } |
| ch->parent->ev_status &= ~(1 << ev_id); |
| DB_PRINT("event lowered %" PRIx8 "\n", ev_id); |
| } else { |
| ch->stall = 1; |
| } |
| } |
| |
| static void pl330_dmawfp(PL330Chan *ch, uint8_t opcode, |
| uint8_t *args, int len) |
| { |
| uint8_t bs = opcode & 3; |
| uint8_t periph_id; |
| |
| if (args[0] & 7) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| periph_id = (args[0] >> 3) & 0x1f; |
| if (periph_id >= ch->parent->num_periph_req) { |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { |
| pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); |
| return; |
| } |
| switch (bs) { |
| case 0: /* S */ |
| ch->request_flag = PL330_SINGLE; |
| ch->wfp_sbp = 0; |
| break; |
| case 1: /* P */ |
| ch->request_flag = PL330_BURST; |
| ch->wfp_sbp = 2; |
| break; |
| case 2: /* B */ |
| ch->request_flag = PL330_BURST; |
| ch->wfp_sbp = 1; |
| break; |
| default: |
| pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); |
| return; |
| } |
| |
| if (ch->parent->periph_busy[periph_id]) { |
| ch->state = pl330_chan_waiting_periph; |
| ch->stall = 1; |
| } else if (ch->state == pl330_chan_waiting_periph) { |
| ch->state = pl330_chan_executing; |
| } |
| } |
| |
| static void pl330_dmawmb(PL330Chan *ch, uint8_t opcode, |
| uint8_t *args, int len) |
| { |
| if (pl330_queue_find_insn(&ch->parent->write_queue, ch->tag, false)) { |
| ch->state = pl330_chan_at_barrier; |
| ch->stall = 1; |
| return; |
| } else { |
| ch->state = pl330_chan_executing; |
| } |
| } |
| |
| /* NULL terminated array of the instruction descriptions. */ |
| static const PL330InsnDesc insn_desc[] = { |
| { .opcode = 0x54, .opmask = 0xFD, .size = 3, .exec = pl330_dmaaddh, }, |
| { .opcode = 0x5c, .opmask = 0xFD, .size = 3, .exec = pl330_dmaadnh, }, |
| { .opcode = 0x00, .opmask = 0xFF, .size = 1, .exec = pl330_dmaend, }, |
| { .opcode = 0x35, .opmask = 0xFF, .size = 2, .exec = pl330_dmaflushp, }, |
| { .opcode = 0xA0, .opmask = 0xFD, .size = 6, .exec = pl330_dmago, }, |
| { .opcode = 0x04, .opmask = 0xFC, .size = 1, .exec = pl330_dmald, }, |
| { .opcode = 0x25, .opmask = 0xFD, .size = 2, .exec = pl330_dmaldp, }, |
| { .opcode = 0x20, .opmask = 0xFD, .size = 2, .exec = pl330_dmalp, }, |
| /* dmastp must be before dmalpend in this list, because their maps |
| * are overlapping |
| */ |
| { .opcode = 0x29, .opmask = 0xFD, .size = 2, .exec = pl330_dmastp, }, |
| { .opcode = 0x28, .opmask = 0xE8, .size = 2, .exec = pl330_dmalpend, }, |
| { .opcode = 0x01, .opmask = 0xFF, .size = 1, .exec = pl330_dmakill, }, |
| { .opcode = 0xBC, .opmask = 0xFF, .size = 6, .exec = pl330_dmamov, }, |
| { .opcode = 0x18, .opmask = 0xFF, .size = 1, .exec = pl330_dmanop, }, |
| { .opcode = 0x12, .opmask = 0xFF, .size = 1, .exec = pl330_dmarmb, }, |
| { .opcode = 0x34, .opmask = 0xFF, .size = 2, .exec = pl330_dmasev, }, |
| { .opcode = 0x08, .opmask = 0xFC, .size = 1, .exec = pl330_dmast, }, |
| { .opcode = 0x0C, .opmask = 0xFF, .size = 1, .exec = pl330_dmastz, }, |
| { .opcode = 0x36, .opmask = 0xFF, .size = 2, .exec = pl330_dmawfe, }, |
| { .opcode = 0x30, .opmask = 0xFC, .size = 2, .exec = pl330_dmawfp, }, |
| { .opcode = 0x13, .opmask = 0xFF, .size = 1, .exec = pl330_dmawmb, }, |
| { .opcode = 0x00, .opmask = 0x00, .size = 0, .exec = NULL, } |
| }; |
| |
| /* Instructions which can be issued via debug registers. */ |
| static const PL330InsnDesc debug_insn_desc[] = { |
| { .opcode = 0xA0, .opmask = 0xFD, .size = 6, .exec = pl330_dmago, }, |
| { .opcode = 0x01, .opmask = 0xFF, .size = 1, .exec = pl330_dmakill, }, |
| { .opcode = 0x34, .opmask = 0xFF, .size = 2, .exec = pl330_dmasev, }, |
| { .opcode = 0x00, .opmask = 0x00, .size = 0, .exec = NULL, } |
| }; |
| |
| static inline const PL330InsnDesc *pl330_fetch_insn(PL330Chan *ch) |
| { |
| uint8_t opcode; |
| int i; |
| |
| dma_memory_read(&address_space_memory, ch->pc, &opcode, 1); |
| for (i = 0; insn_desc[i].size; i++) { |
| if ((opcode & insn_desc[i].opmask) == insn_desc[i].opcode) { |
| return &insn_desc[i]; |
| } |
| } |
| return NULL; |
| } |
| |
| static inline void pl330_exec_insn(PL330Chan *ch, const PL330InsnDesc *insn) |
| { |
| uint8_t buf[PL330_INSN_MAXSIZE]; |
| |
| assert(insn->size <= PL330_INSN_MAXSIZE); |
| dma_memory_read(&address_space_memory, ch->pc, buf, insn->size); |
| insn->exec(ch, buf[0], &buf[1], insn->size - 1); |
| } |
| |
| static inline void pl330_update_pc(PL330Chan *ch, |
| const PL330InsnDesc *insn) |
| { |
| ch->pc += insn->size; |
| } |
| |
| /* Try to execute current instruction in channel CH. Number of executed |
| instructions is returned (0 or 1). */ |
| static int pl330_chan_exec(PL330Chan *ch) |
| { |
| const PL330InsnDesc *insn; |
| |
| if (ch->state != pl330_chan_executing && |
| ch->state != pl330_chan_waiting_periph && |
| ch->state != pl330_chan_at_barrier && |
| ch->state != pl330_chan_waiting_event) { |
| return 0; |
| } |
| ch->stall = 0; |
| insn = pl330_fetch_insn(ch); |
| if (!insn) { |
| DB_PRINT("pl330 undefined instruction\n"); |
| pl330_fault(ch, PL330_FAULT_UNDEF_INSTR); |
| return 0; |
| } |
| pl330_exec_insn(ch, insn); |
| if (!ch->stall) { |
| pl330_update_pc(ch, insn); |
| ch->watchdog_timer = 0; |
| return 1; |
| /* WDT only active in exec state */ |
| } else if (ch->state == pl330_chan_executing) { |
| ch->watchdog_timer++; |
| if (ch->watchdog_timer >= PL330_WATCHDOG_LIMIT) { |
| pl330_fault(ch, PL330_FAULT_LOCKUP_ERR); |
| } |
| } |
| return 0; |
| } |
| |
| /* Try to execute 1 instruction in each channel, one instruction from read |
| queue and one instruction from write queue. Number of successfully executed |
| instructions is returned. */ |
| static int pl330_exec_cycle(PL330Chan *channel) |
| { |
| PL330State *s = channel->parent; |
| PL330QueueEntry *q; |
| int i; |
| int num_exec = 0; |
| int fifo_res = 0; |
| uint8_t buf[PL330_MAX_BURST_LEN]; |
| |
| /* Execute one instruction in each channel */ |
| num_exec += pl330_chan_exec(channel); |
| |
| /* Execute one instruction from read queue */ |
| q = pl330_queue_find_insn(&s->read_queue, PL330_UNTAGGED, true); |
| if (q != NULL && q->len <= pl330_fifo_num_free(&s->fifo)) { |
| int len = q->len - (q->addr & (q->len - 1)); |
| |
| dma_memory_read(&address_space_memory, q->addr, buf, len); |
| if (PL330_ERR_DEBUG > 1) { |
| DB_PRINT("PL330 read from memory @%08" PRIx32 " (size = %08x):\n", |
| q->addr, len); |
| qemu_hexdump((char *)buf, stderr, "", len); |
| } |
| fifo_res = pl330_fifo_push(&s->fifo, buf, len, q->tag); |
| if (fifo_res == PL330_FIFO_OK) { |
| if (q->inc) { |
| q->addr += len; |
| } |
| q->n--; |
| if (!q->n) { |
| pl330_queue_remove_insn(&s->read_queue, q); |
| } |
| num_exec++; |
| } |
| } |
| |
| /* Execute one instruction from write queue. */ |
| q = pl330_queue_find_insn(&s->write_queue, pl330_fifo_tag(&s->fifo), true); |
| if (q != NULL) { |
| int len = q->len - (q->addr & (q->len - 1)); |
| |
| if (q->z) { |
| for (i = 0; i < len; i++) { |
| buf[i] = 0; |
| } |
| } else { |
| fifo_res = pl330_fifo_get(&s->fifo, buf, len, q->tag); |
| } |
| if (fifo_res == PL330_FIFO_OK || q->z) { |
| dma_memory_write(&address_space_memory, q->addr, buf, len); |
| if (PL330_ERR_DEBUG > 1) { |
| DB_PRINT("PL330 read from memory @%08" PRIx32 |
| " (size = %08x):\n", q->addr, len); |
| qemu_hexdump((char *)buf, stderr, "", len); |
| } |
| if (q->inc) { |
| q->addr += len; |
| } |
| num_exec++; |
| } else if (fifo_res == PL330_FIFO_STALL) { |
| pl330_fault(&channel->parent->chan[q->tag], |
| PL330_FAULT_FIFOEMPTY_ERR); |
| } |
| q->n--; |
| if (!q->n) { |
| pl330_queue_remove_insn(&s->write_queue, q); |
| } |
| } |
| |
| return num_exec; |
| } |
| |
| static int pl330_exec_channel(PL330Chan *channel) |
| { |
| int insr_exec = 0; |
| |
| /* TODO: Is it all right to execute everything or should we do per-cycle |
| simulation? */ |
| while (pl330_exec_cycle(channel)) { |
| insr_exec++; |
| } |
| |
| /* Detect deadlock */ |
| if (channel->state == pl330_chan_executing) { |
| pl330_fault(channel, PL330_FAULT_LOCKUP_ERR); |
| } |
| /* Situation when one of the queues has deadlocked but all channels |
| * have finished their programs should be impossible. |
| */ |
| |
| return insr_exec; |
| } |
| |
| static inline void pl330_exec(PL330State *s) |
| { |
| DB_PRINT("\n"); |
| int i, insr_exec; |
| do { |
| insr_exec = pl330_exec_channel(&s->manager); |
| |
| for (i = 0; i < s->num_chnls; i++) { |
| insr_exec += pl330_exec_channel(&s->chan[i]); |
| } |
| } while (insr_exec); |
| } |
| |
| static void pl330_exec_cycle_timer(void *opaque) |
| { |
| PL330State *s = (PL330State *)opaque; |
| pl330_exec(s); |
| } |
| |
| /* Stop or restore dma operations */ |
| |
| static void pl330_dma_stop_irq(void *opaque, int irq, int level) |
| { |
| PL330State *s = (PL330State *)opaque; |
| |
| if (s->periph_busy[irq] != level) { |
| s->periph_busy[irq] = level; |
| timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); |
| } |
| } |
| |
| static void pl330_debug_exec(PL330State *s) |
| { |
| uint8_t args[5]; |
| uint8_t opcode; |
| uint8_t chan_id; |
| int i; |
| PL330Chan *ch; |
| const PL330InsnDesc *insn; |
| |
| s->debug_status = 1; |
| chan_id = (s->dbg[0] >> 8) & 0x07; |
| opcode = (s->dbg[0] >> 16) & 0xff; |
| args[0] = (s->dbg[0] >> 24) & 0xff; |
| args[1] = (s->dbg[1] >> 0) & 0xff; |
| args[2] = (s->dbg[1] >> 8) & 0xff; |
| args[3] = (s->dbg[1] >> 16) & 0xff; |
| args[4] = (s->dbg[1] >> 24) & 0xff; |
| DB_PRINT("chan id: %" PRIx8 "\n", chan_id); |
| if (s->dbg[0] & 1) { |
| ch = &s->chan[chan_id]; |
| } else { |
| ch = &s->manager; |
| } |
| insn = NULL; |
| for (i = 0; debug_insn_desc[i].size; i++) { |
| if ((opcode & debug_insn_desc[i].opmask) == debug_insn_desc[i].opcode) { |
| insn = &debug_insn_desc[i]; |
| } |
| } |
| if (!insn) { |
| pl330_fault(ch, PL330_FAULT_UNDEF_INSTR | PL330_FAULT_DBG_INSTR); |
| return ; |
| } |
| ch->stall = 0; |
| insn->exec(ch, opcode, args, insn->size - 1); |
| if (ch->fault_type) { |
| ch->fault_type |= PL330_FAULT_DBG_INSTR; |
| } |
| if (ch->stall) { |
| qemu_log_mask(LOG_UNIMP, "pl330: stall of debug instruction not " |
| "implemented\n"); |
| } |
| s->debug_status = 0; |
| } |
| |
| /* IOMEM mapped registers */ |
| |
| static void pl330_iomem_write(void *opaque, hwaddr offset, |
| uint64_t value, unsigned size) |
| { |
| PL330State *s = (PL330State *) opaque; |
| int i; |
| |
| DB_PRINT("addr: %08x data: %08x\n", (unsigned)offset, (unsigned)value); |
| |
| switch (offset) { |
| case PL330_REG_INTEN: |
| s->inten = value; |
| break; |
| case PL330_REG_INTCLR: |
| for (i = 0; i < s->num_events; i++) { |
| if (s->int_status & s->inten & value & (1 << i)) { |
| DB_PRINT("event interrupt lowered %d\n", i); |
| qemu_irq_lower(s->irq[i]); |
| } |
| } |
| s->ev_status &= ~(value & s->inten); |
| s->int_status &= ~(value & s->inten); |
| break; |
| case PL330_REG_DBGCMD: |
| if ((value & 3) == 0) { |
| pl330_debug_exec(s); |
| pl330_exec(s); |
| } else { |
| qemu_log_mask(LOG_GUEST_ERROR, "pl330: write of illegal value %u " |
| "for offset " TARGET_FMT_plx "\n", (unsigned)value, |
| offset); |
| } |
| break; |
| case PL330_REG_DBGINST0: |
| DB_PRINT("s->dbg[0] = %08x\n", (unsigned)value); |
| s->dbg[0] = value; |
| break; |
| case PL330_REG_DBGINST1: |
| DB_PRINT("s->dbg[1] = %08x\n", (unsigned)value); |
| s->dbg[1] = value; |
| break; |
| default: |
| qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad write offset " TARGET_FMT_plx |
| "\n", offset); |
| break; |
| } |
| } |
| |
| static inline uint32_t pl330_iomem_read_imp(void *opaque, |
| hwaddr offset) |
| { |
| PL330State *s = (PL330State *)opaque; |
| int chan_id; |
| int i; |
| uint32_t res; |
| |
| if (offset >= PL330_REG_PERIPH_ID && offset < PL330_REG_PERIPH_ID + 32) { |
| return pl330_id[(offset - PL330_REG_PERIPH_ID) >> 2]; |
| } |
| if (offset >= PL330_REG_CR0_BASE && offset < PL330_REG_CR0_BASE + 24) { |
| return s->cfg[(offset - PL330_REG_CR0_BASE) >> 2]; |
| } |
| if (offset >= PL330_REG_CHANCTRL && offset < PL330_REG_DBGSTATUS) { |
| offset -= PL330_REG_CHANCTRL; |
| chan_id = offset >> 5; |
| if (chan_id >= s->num_chnls) { |
| qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " |
| TARGET_FMT_plx "\n", offset); |
| return 0; |
| } |
| switch (offset & 0x1f) { |
| case 0x00: |
| return s->chan[chan_id].src; |
| case 0x04: |
| return s->chan[chan_id].dst; |
| case 0x08: |
| return s->chan[chan_id].control; |
| case 0x0C: |
| return s->chan[chan_id].lc[0]; |
| case 0x10: |
| return s->chan[chan_id].lc[1]; |
| default: |
| qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " |
| TARGET_FMT_plx "\n", offset); |
| return 0; |
| } |
| } |
| if (offset >= PL330_REG_CSR_BASE && offset < 0x400) { |
| offset -= PL330_REG_CSR_BASE; |
| chan_id = offset >> 3; |
| if (chan_id >= s->num_chnls) { |
| qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " |
| TARGET_FMT_plx "\n", offset); |
| return 0; |
| } |
| switch ((offset >> 2) & 1) { |
| case 0x0: |
| res = (s->chan[chan_id].ns << 21) | |
| (s->chan[chan_id].wakeup << 4) | |
| (s->chan[chan_id].state) | |
| (s->chan[chan_id].wfp_sbp << 14); |
| return res; |
| case 0x1: |
| return s->chan[chan_id].pc; |
| default: |
| qemu_log_mask(LOG_GUEST_ERROR, "pl330: read error\n"); |
| return 0; |
| } |
| } |
| if (offset >= PL330_REG_FTR_BASE && offset < 0x100) { |
| offset -= PL330_REG_FTR_BASE; |
| chan_id = offset >> 2; |
| if (chan_id >= s->num_chnls) { |
| qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " |
| TARGET_FMT_plx "\n", offset); |
| return 0; |
| } |
| return s->chan[chan_id].fault_type; |
| } |
| switch (offset) { |
| case PL330_REG_DSR: |
| return (s->manager.ns << 9) | (s->manager.wakeup << 4) | |
| (s->manager.state & 0xf); |
| case PL330_REG_DPC: |
| return s->manager.pc; |
| case PL330_REG_INTEN: |
| return s->inten; |
| case PL330_REG_INT_EVENT_RIS: |
| return s->ev_status; |
| case PL330_REG_INTMIS: |
| return s->int_status; |
| case PL330_REG_INTCLR: |
| /* Documentation says that we can't read this register |
| * but linux kernel does it |
| */ |
| return 0; |
| case PL330_REG_FSRD: |
| return s->manager.state ? 1 : 0; |
| case PL330_REG_FSRC: |
| res = 0; |
| for (i = 0; i < s->num_chnls; i++) { |
| if (s->chan[i].state == pl330_chan_fault || |
| s->chan[i].state == pl330_chan_fault_completing) { |
| res |= 1 << i; |
| } |
| } |
| return res; |
| case PL330_REG_FTRD: |
| return s->manager.fault_type; |
| case PL330_REG_DBGSTATUS: |
| return s->debug_status; |
| default: |
| qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " |
| TARGET_FMT_plx "\n", offset); |
| } |
| return 0; |
| } |
| |
| static uint64_t pl330_iomem_read(void *opaque, hwaddr offset, |
| unsigned size) |
| { |
| uint32_t ret = pl330_iomem_read_imp(opaque, offset); |
| DB_PRINT("addr: %08" HWADDR_PRIx " data: %08" PRIx32 "\n", offset, ret); |
| return ret; |
| } |
| |
| static const MemoryRegionOps pl330_ops = { |
| .read = pl330_iomem_read, |
| .write = pl330_iomem_write, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| .impl = { |
| .min_access_size = 4, |
| .max_access_size = 4, |
| } |
| }; |
| |
| /* Controller logic and initialization */ |
| |
| static void pl330_chan_reset(PL330Chan *ch) |
| { |
| ch->src = 0; |
| ch->dst = 0; |
| ch->pc = 0; |
| ch->state = pl330_chan_stopped; |
| ch->watchdog_timer = 0; |
| ch->stall = 0; |
| ch->control = 0; |
| ch->status = 0; |
| ch->fault_type = 0; |
| } |
| |
| static void pl330_reset(DeviceState *d) |
| { |
| int i; |
| PL330State *s = PL330(d); |
| |
| s->inten = 0; |
| s->int_status = 0; |
| s->ev_status = 0; |
| s->debug_status = 0; |
| s->num_faulting = 0; |
| s->manager.ns = s->mgr_ns_at_rst; |
| pl330_fifo_reset(&s->fifo); |
| pl330_queue_reset(&s->read_queue); |
| pl330_queue_reset(&s->write_queue); |
| |
| for (i = 0; i < s->num_chnls; i++) { |
| pl330_chan_reset(&s->chan[i]); |
| } |
| for (i = 0; i < s->num_periph_req; i++) { |
| s->periph_busy[i] = 0; |
| } |
| |
| timer_del(s->timer); |
| } |
| |
| static void pl330_realize(DeviceState *dev, Error **errp) |
| { |
| int i; |
| PL330State *s = PL330(dev); |
| |
| sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq_abort); |
| memory_region_init_io(&s->iomem, OBJECT(s), &pl330_ops, s, |
| "dma", PL330_IOMEM_SIZE); |
| sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem); |
| |
| s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, pl330_exec_cycle_timer, s); |
| |
| s->cfg[0] = (s->mgr_ns_at_rst ? 0x4 : 0) | |
| (s->num_periph_req > 0 ? 1 : 0) | |
| ((s->num_chnls - 1) & 0x7) << 4 | |
| ((s->num_periph_req - 1) & 0x1f) << 12 | |
| ((s->num_events - 1) & 0x1f) << 17; |
| |
| switch (s->i_cache_len) { |
| case (4): |
| s->cfg[1] |= 2; |
| break; |
| case (8): |
| s->cfg[1] |= 3; |
| break; |
| case (16): |
| s->cfg[1] |= 4; |
| break; |
| case (32): |
| s->cfg[1] |= 5; |
| break; |
| default: |
| error_setg(errp, "Bad value for i-cache_len property: %" PRIx8 "\n", |
| s->i_cache_len); |
| return; |
| } |
| s->cfg[1] |= ((s->num_i_cache_lines - 1) & 0xf) << 4; |
| |
| s->chan = g_new0(PL330Chan, s->num_chnls); |
| s->hi_seqn = g_new0(uint8_t, s->num_chnls); |
| s->lo_seqn = g_new0(uint8_t, s->num_chnls); |
| for (i = 0; i < s->num_chnls; i++) { |
| s->chan[i].parent = s; |
| s->chan[i].tag = (uint8_t)i; |
| } |
| s->manager.parent = s; |
| s->manager.tag = s->num_chnls; |
| s->manager.is_manager = true; |
| |
| s->irq = g_new0(qemu_irq, s->num_events); |
| for (i = 0; i < s->num_events; i++) { |
| sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq[i]); |
| } |
| |
| qdev_init_gpio_in(dev, pl330_dma_stop_irq, PL330_PERIPH_NUM); |
| |
| switch (s->data_width) { |
| case (32): |
| s->cfg[CFG_CRD] |= 0x2; |
| break; |
| case (64): |
| s->cfg[CFG_CRD] |= 0x3; |
| break; |
| case (128): |
| s->cfg[CFG_CRD] |= 0x4; |
| break; |
| default: |
| error_setg(errp, "Bad value for data_width property: %" PRIx8 "\n", |
| s->data_width); |
| return; |
| } |
| |
| s->cfg[CFG_CRD] |= ((s->wr_cap - 1) & 0x7) << 4 | |
| ((s->wr_q_dep - 1) & 0xf) << 8 | |
| ((s->rd_cap - 1) & 0x7) << 12 | |
| ((s->rd_q_dep - 1) & 0xf) << 16 | |
| ((s->data_buffer_dep - 1) & 0x1ff) << 20; |
| |
| pl330_queue_init(&s->read_queue, s->rd_q_dep, s); |
| pl330_queue_init(&s->write_queue, s->wr_q_dep, s); |
| pl330_fifo_init(&s->fifo, s->data_width / 4 * s->data_buffer_dep); |
| } |
| |
| static Property pl330_properties[] = { |
| /* CR0 */ |
| DEFINE_PROP_UINT32("num_chnls", PL330State, num_chnls, 8), |
| DEFINE_PROP_UINT8("num_periph_req", PL330State, num_periph_req, 4), |
| DEFINE_PROP_UINT8("num_events", PL330State, num_events, 16), |
| DEFINE_PROP_UINT8("mgr_ns_at_rst", PL330State, mgr_ns_at_rst, 0), |
| /* CR1 */ |
| DEFINE_PROP_UINT8("i-cache_len", PL330State, i_cache_len, 4), |
| DEFINE_PROP_UINT8("num_i-cache_lines", PL330State, num_i_cache_lines, 8), |
| /* CR2-4 */ |
| DEFINE_PROP_UINT32("boot_addr", PL330State, cfg[CFG_BOOT_ADDR], 0), |
| DEFINE_PROP_UINT32("INS", PL330State, cfg[CFG_INS], 0), |
| DEFINE_PROP_UINT32("PNS", PL330State, cfg[CFG_PNS], 0), |
| /* CRD */ |
| DEFINE_PROP_UINT8("data_width", PL330State, data_width, 64), |
| DEFINE_PROP_UINT8("wr_cap", PL330State, wr_cap, 8), |
| DEFINE_PROP_UINT8("wr_q_dep", PL330State, wr_q_dep, 16), |
| DEFINE_PROP_UINT8("rd_cap", PL330State, rd_cap, 8), |
| DEFINE_PROP_UINT8("rd_q_dep", PL330State, rd_q_dep, 16), |
| DEFINE_PROP_UINT16("data_buffer_dep", PL330State, data_buffer_dep, 256), |
| |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void pl330_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| dc->realize = pl330_realize; |
| dc->reset = pl330_reset; |
| dc->props = pl330_properties; |
| dc->vmsd = &vmstate_pl330; |
| } |
| |
| static const TypeInfo pl330_type_info = { |
| .name = TYPE_PL330, |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(PL330State), |
| .class_init = pl330_class_init, |
| }; |
| |
| static void pl330_register_types(void) |
| { |
| type_register_static(&pl330_type_info); |
| } |
| |
| type_init(pl330_register_types) |