* [Qemu-devel] [PATCH v5 1/2] pl330: Initial version
2012-10-29 6:35 [Qemu-devel] [PATCH v5 0/2] These patches add support for the Primcell PL330 DMA controller and add it to the Xilinx Zynq machine model. Patch 1 is the device model. Patch 2 is the machine model update Peter Crosthwaite
@ 2012-10-29 6:35 ` Peter Crosthwaite
2012-10-29 8:32 ` Peter Maydell
2012-10-29 9:41 ` Igor Mitsyanko
2012-10-29 6:35 ` [Qemu-devel] [PATCH v5 2/2] xilinx_zynq: added pl330 to machine model Peter Crosthwaite
1 sibling, 2 replies; 10+ messages in thread
From: Peter Crosthwaite @ 2012-10-29 6:35 UTC (permalink / raw)
To: qemu-devel, peter.maydell, i.mitsyanko
Cc: vineshp, Peter Crosthwaite, Kirill Batuzov, john.williams,
edgar.iglesias, afaerber
Device model for Primecell PL330 dma controller.
Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru>
Tested-by: Igor Mitsyanko <i.mitsyanko@samsung.com>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
---
changed from v4:
Various cosmetic fixes
Some Makefile refactoring updates
refactored properties to match primecell options rather than be the config
register values (PMM review)
s/chanel/channel (PMM review)
elaborated names of single letter fields of PL330FIFO (PMM review)
remove use of target_phys_addr_t (PMM review)
"Put instruction to queue" - fixed comment style (PMM review)
changed dmago non-manager usage to throw PL330_FAULT_UNDEF (Igor Review)
Added VMSD (PMM review)
Changed version to r01p01 (PMM Review)
const'ified TypeInfo (Igor review)
changed from v3:
rebased against Makefile refactor
changed from v2 (in order of diff appearance):
GPL version changed to v2 or later
Register and field names changed to match TRM
id field corrected
PL330ChanState enum corrected
target_phys_addr_t usages removed
identifier camel casing and underscoring fixed
data fifo reworked (uses head ptr and a occupancy count rather than head & tail ptrs)
pl330_insn_from_queue->pl330_queue_remove_insn
Numerous typos in comments corrected as per review
g_malloc0(sizeof(a) * b) -> g_new
pl330_fifo_inc: changed to accept PL330Fifo struct as argument (rather than buf_size)
pl330_fifo_push/get: rollback on overflow mechanism replaced with pre-check
pl330_queue_find_insn: fixed ugly if statement whitespace (PMM review)
pl330_dmaaddh: fixed arugment reversal
pl330_dmaaddh: asserted on !manager
"ns": change to be and behave like a boolean globally
pl330_dmald: force num=1 when PL330_SINGLE
pl330_dma_kill: put in correct alphabet order
pl330_dmarmb/wmb:implemented
pl330_exec_insn: asserted insn->size not too big
pl330_exec_insn: enabled stall mechanism outside exec state (needed for rmb/wmb)
pl330_debug_exec: assert fault type on a fault
pl330_iomem_write: removed aligmnent assertion
pl330_iomem_write: corrected ev_status and irq_status logic
pl330_iomem_read_imp: fixed some incorrect bitfield positions (PMM review)
pl330_reset: stopped timer
pl330_init: removed redundant reset
changed from v1:
GPLv2 license
some code formatting fixes
default-configs/arm-softmmu.mak | 1 +
hw/Makefile.objs | 1 +
hw/pl330.c | 1587 +++++++++++++++++++++++++++++++++++++++
3 files changed, 1589 insertions(+), 0 deletions(-)
create mode 100644 hw/pl330.c
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index 2f1a5c9..1775455 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -41,6 +41,7 @@ CONFIG_PL110=y
CONFIG_PL181=y
CONFIG_PL190=y
CONFIG_PL310=y
+CONFIG_PL330=y
CONFIG_CADENCE=y
CONFIG_XGMAC=y
diff --git a/hw/Makefile.objs b/hw/Makefile.objs
index af4ab0c..584c688 100644
--- a/hw/Makefile.objs
+++ b/hw/Makefile.objs
@@ -89,6 +89,7 @@ common-obj-$(CONFIG_PL110) += pl110.o
common-obj-$(CONFIG_PL181) += pl181.o
common-obj-$(CONFIG_PL190) += pl190.o
common-obj-$(CONFIG_PL310) += arm_l2x0.o
+common-obj-$(CONFIG_PL330) += pl330.o
common-obj-$(CONFIG_VERSATILE_PCI) += versatile_pci.o
common-obj-$(CONFIG_VERSATILE_I2C) += versatile_i2c.o
common-obj-$(CONFIG_CADENCE) += cadence_uart.o
diff --git a/hw/pl330.c b/hw/pl330.c
new file mode 100644
index 0000000..5eaf735
--- /dev/null
+++ b/hw/pl330.c
@@ -0,0 +1,1587 @@
+/*
+ * 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 "sysbus.h"
+#include "qemu-timer.h"
+
+#ifdef PL330_ERR_DEBUG
+#define DB_PRINT(...) do { \
+ fprintf(stderr, ": %s: ", __func__); \
+ fprintf(stderr, ## __VA_ARGS__); \
+ } while (0);
+#else
+ #define DB_PRINT(...)
+#endif
+
+#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 PL330 PL330;
+
+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;
+ PL330 *parent;
+ uint8_t tag;
+} PL330Chan;
+
+static const VMStateDescription vmstate_pl330_chan = {
+ .name = "pl330_chan",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 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,
+ .minimum_version_id_old = 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,
+ .minimum_version_id_old = 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 {
+ PL330QueueEntry *queue;
+ uint32_t queue_size;
+ uint32_t chan_num;
+ uint8_t *lo_seqn;
+ uint8_t *hi_seqn;
+} PL330Queue;
+
+static const VMStateDescription vmstate_pl330_queue = {
+ .name = "pl330_queue",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_STRUCT_VARRAY_UINT32(queue, PL330Queue, queue_size, 1,
+ vmstate_pl330_queue_entry, PL330QueueEntry),
+ VMSTATE_VBUFFER_UINT32(lo_seqn, PL330Queue, 1, NULL, 0, chan_num),
+ VMSTATE_VBUFFER_UINT32(hi_seqn, PL330Queue, 1, NULL, 0, chan_num),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+struct PL330 {
+ SysBusDevice busdev;
+ 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 */
+ uint8_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;
+ 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];
+
+};
+
+static const VMStateDescription vmstate_pl330 = {
+ .name = "pl330",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_STRUCT(manager, PL330, 0, vmstate_pl330_chan, PL330Chan),
+ VMSTATE_STRUCT_VARRAY_UINT8(chan, PL330, num_chnls, 0,
+ vmstate_pl330_chan, PL330Chan),
+ VMSTATE_STRUCT(fifo, PL330, 0, vmstate_pl330_fifo, PL330Fifo),
+ VMSTATE_STRUCT(read_queue, PL330, 0, vmstate_pl330_queue, PL330Queue),
+ VMSTATE_STRUCT(write_queue, PL330, 0, vmstate_pl330_queue, PL330Queue),
+ VMSTATE_TIMER(timer, PL330),
+ VMSTATE_UINT32(inten, PL330),
+ VMSTATE_UINT32(int_status, PL330),
+ VMSTATE_UINT32(ev_status, PL330),
+ VMSTATE_UINT32_ARRAY(dbg, PL330, 2),
+ VMSTATE_UINT8(debug_status, PL330),
+ VMSTATE_UINT8(num_faulting, PL330),
+ VMSTATE_UINT8_ARRAY(periph_busy, PL330, 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, int channum)
+{
+ s->queue = (PL330QueueEntry *)g_new0(PL330QueueEntry, size);
+ s->chan_num = channum;
+ s->lo_seqn = (uint8_t *)g_malloc0(channum);
+ s->hi_seqn = (uint8_t *)g_malloc0(channum);
+ 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 to 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,
+ PL330Chan *c)
+{
+ 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->hi_seqn[tag];
+ s->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)
+ * - it can be issued 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)
+{
+ int i;
+
+ for (i = 0; i < s->queue_size; i++) {
+ if (s->queue[i].tag != PL330_UNTAGGED) {
+ if (s->queue[i].seqn == s->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->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: %x\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_dmaaddh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len)
+{
+ uint16_t im = (((uint16_t)args[1]) << 8) | ((uint16_t)args[0]);
+ uint8_t ra = (opcode >> 1) & 1;
+
+ if (ch->is_manager) {
+ pl330_fault(ch, PL330_FAULT_UNDEF_INSTR);
+ return;
+ }
+ if (ra) {
+ ch->dst += im;
+ } else {
+ ch->src += im;
+ }
+}
+
+static void pl330_dmaend(PL330Chan *ch, uint8_t opcode,
+ uint8_t *args, int len)
+{
+ if (ch->state == pl330_chan_executing && !ch->is_manager) {
+ /* Wait for all transfers to complete */
+ if (pl330_fifo_has_tag(&ch->parent->fifo, ch->tag) ||
+ pl330_queue_find_insn(&ch->parent->read_queue, ch->tag) != NULL ||
+ pl330_queue_find_insn(&ch->parent->write_queue, ch->tag) != NULL) {
+
+ ch->stall = 1;
+ return;
+ }
+ }
+ 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_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->src &= ~(size - 1);
+ ch->stall = pl330_queue_put_insn(&ch->parent->read_queue, ch->src,
+ size, num, inc, 0, ch->tag, ch);
+ if (inc & !ch->stall) {
+ ch->src += size * num;
+ }
+}
+
+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]--;
+ }
+ ch->pc -= args[0];
+ ch->pc -= len + 1;
+ /* "ch->pc -= args[0] + len + 1" is incorrect when args[0] == 256 */
+ }
+}
+
+
+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)) {
+ ch->state = pl330_chan_at_barrier;
+ ch->stall = 1;
+ return;
+ }
+}
+
+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 %d\n", ev_id);
+ qemu_irq_raise(ch->parent->irq[ev_id]);
+ } else {
+ 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->dst &= ~(size - 1);
+ ch->stall = pl330_queue_put_insn(&ch->parent->write_queue, ch->dst,
+ size, num, inc, 0, ch->tag, ch);
+ if (inc) {
+ ch->dst += size * num;
+ }
+}
+
+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, ch);
+ if (inc) {
+ ch->dst += size * num;
+ }
+}
+
+static void pl330_dmawfe(PL330Chan *ch, uint8_t opcode,
+ uint8_t *args, int len)
+{
+ uint8_t ev_id;
+
+ 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->parent->ev_status &= ~(1 << 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)) {
+ ch->state = pl330_chan_at_barrier;
+ ch->stall = 1;
+ return;
+ }
+}
+
+/* NULL terminated array of the instruction descriptions. */
+static const PL330InsnDesc insn_desc[] = {
+ { .opcode = 0x54, .opmask = 0xFD, .size = 3, .exec = pl330_dmaaddh, },
+ { .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;
+
+ cpu_physical_memory_read(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);
+ cpu_physical_memory_read(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) {
+ DB_PRINT("%d\n", ch->state);
+ 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)
+{
+ PL330 *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);
+ if (q != NULL && q->len <= pl330_fifo_num_free(&s->fifo)) {
+ cpu_physical_memory_read(q->addr, buf, q->len);
+ fifo_res = pl330_fifo_push(&s->fifo, buf, q->len, q->tag);
+ if (fifo_res == PL330_FIFO_OK) {
+ if (q->inc) {
+ q->addr += q->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));
+ if (q != NULL) {
+ if (q->z) {
+ for (i = 0; i < q->len; i++) {
+ buf[i] = 0;
+ }
+ } else {
+ fifo_res = pl330_fifo_get(&s->fifo, buf, q->len, q->tag);
+ }
+ if (fifo_res == PL330_FIFO_OK || q->z) {
+ cpu_physical_memory_write(q->addr, buf, q->len);
+ if (q->inc) {
+ q->addr += q->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(PL330 *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)
+{
+ PL330 *s = (PL330 *)opaque;
+ pl330_exec(s);
+}
+
+/* Stop or restore dma operations */
+
+static void pl330_dma_stop_irq(void *opaque, int irq, int level)
+{
+ PL330 *s = (PL330 *)opaque;
+
+ if (s->periph_busy[irq] != level) {
+ s->periph_busy[irq] = level;
+ qemu_mod_timer(s->timer, qemu_get_clock_ns(vm_clock));
+ }
+}
+
+static void pl330_debug_exec(PL330 *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: %d\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) {
+ hw_error("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)
+{
+ PL330 *s = (PL330 *) opaque;
+ uint32_t 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 {
+ hw_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:
+ hw_error("pl330: bad write offset " TARGET_FMT_plx "\n", offset);
+ break;
+ }
+}
+
+static inline uint32_t pl330_iomem_read_imp(void *opaque,
+ hwaddr offset)
+{
+ PL330 *s = (PL330 *) opaque;
+ int chan_id;
+ int i;
+ uint32_t res;
+
+ if (offset & 3) {
+ hw_error("pl330: bad read offset " TARGET_FMT_plx "\n", offset);
+ }
+
+ 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) {
+ hw_error("pl330: bad read offset " TARGET_FMT_plx "\n", offset);
+ }
+ 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:
+ hw_error("pl330: bad read offset " TARGET_FMT_plx "\n", offset);
+ }
+ }
+ if (offset >= PL330_REG_CSR_BASE && offset < 0x400) {
+ offset -= PL330_REG_CSR_BASE;
+ chan_id = offset >> 3;
+ if (chan_id >= s->num_chnls) {
+ hw_error("pl330: bad read offset " TARGET_FMT_plx "\n", offset);
+ }
+ 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:
+ hw_error("pl330: read error\n");
+ }
+ }
+ if (offset >= PL330_REG_FTR_BASE && offset < 0x100) {
+ offset -= PL330_REG_FTR_BASE;
+ chan_id = offset >> 2;
+ if (chan_id >= s->num_chnls) {
+ hw_error("pl330: bad read offset " TARGET_FMT_plx "\n", offset);
+ }
+ 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:
+ hw_error("pl330: bad read offset " TARGET_FMT_plx "\n", offset);
+ }
+ return 0;
+}
+
+static uint64_t pl330_iomem_read(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ uint64_t ret = pl330_iomem_read_imp(opaque, offset);
+
+ DB_PRINT("addr: %08x data: %08x\n", (unsigned)offset, ret);
+ return ret;
+}
+
+static const MemoryRegionOps pl330_ops = {
+ .read = pl330_iomem_read,
+ .write = pl330_iomem_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+/* 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;
+ PL330 *s = FROM_SYSBUS(PL330, sysbus_from_qdev(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;
+ }
+
+ qemu_del_timer(s->timer);
+}
+
+static int pl330_init(SysBusDevice *dev)
+{
+ int i;
+ PL330 *s = FROM_SYSBUS(PL330, dev);
+
+ sysbus_init_irq(dev, &s->irq_abort);
+ memory_region_init_io(&s->iomem, &pl330_ops, s, "dma", PL330_IOMEM_SIZE);
+ sysbus_init_mmio(dev, &s->iomem);
+
+ s->timer = qemu_new_timer_ns(vm_clock, 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:
+ hw_error("Bad value for i-cache_len property: %d\n", s->i_cache_len);
+ }
+ s->cfg[1] |= ((s->num_i_cache_lines - 1) & 0xf) << 4;
+
+ s->chan = g_new0(PL330Chan, 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 = 1;
+
+ s->irq = g_new0(qemu_irq, s->num_events);
+ for (i = 0; i < s->num_events; i++) {
+ sysbus_init_irq(dev, &s->irq[i]);
+ }
+
+ qdev_init_gpio_in(&dev->qdev, pl330_dma_stop_irq, PL330_PERIPH_NUM);
+
+ s->cfg[CFG_CRD] = (s->data_width & 0x3) |
+ ((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->num_chnls);
+ pl330_queue_init(&s->write_queue, s->wr_q_dep, s->num_chnls);
+ pl330_fifo_init(&s->fifo, s->data_buffer_dep);
+
+ return 0;
+}
+
+static Property pl330_properties[] = {
+ /* CR0 */
+ DEFINE_PROP_UINT8("num_chnls", PL330, num_chnls, 8),
+ DEFINE_PROP_UINT8("num_periph_req", PL330, num_periph_req, 8),
+ DEFINE_PROP_UINT8("num_events", PL330, num_events, 8),
+ DEFINE_PROP_UINT8("mgr_ns_at_rst", PL330, mgr_ns_at_rst, 0),
+ /* CR1 */
+ DEFINE_PROP_UINT8("i-cache_len", PL330, i_cache_len, 4),
+ DEFINE_PROP_UINT8("num_i-cache_lines", PL330, num_i_cache_lines, 8),
+
+ DEFINE_PROP_UINT8("mgr_ns_at_rst", PL330, mgr_ns_at_rst, 0),
+
+ /* CR2-4 */
+ DEFINE_PROP_UINT32("boot_addr", PL330, cfg[CFG_BOOT_ADDR], 0),
+ DEFINE_PROP_UINT32("INS", PL330, cfg[CFG_INS], 0),
+ DEFINE_PROP_UINT32("PNS", PL330, cfg[CFG_PNS], 0),
+ /* CRD */
+ DEFINE_PROP_UINT8("data_width", PL330, data_width, 0),
+ DEFINE_PROP_UINT8("wr_cap", PL330, wr_cap, 0),
+ DEFINE_PROP_UINT8("wr_q_dep", PL330, wr_q_dep, 0),
+ DEFINE_PROP_UINT8("rd_cap", PL330, rd_cap, 0),
+ DEFINE_PROP_UINT8("rd_q_dep", PL330, rd_q_dep, 0),
+ DEFINE_PROP_UINT16("data_buffer_dep", PL330, data_buffer_dep, 0),
+
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void pl330_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+ k->init = pl330_init;
+ dc->reset = pl330_reset;
+ dc->props = pl330_properties;
+ dc->vmsd = &vmstate_pl330;
+}
+
+static const TypeInfo pl330_type_info = {
+ .name = "pl330",
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(PL330),
+ .class_init = pl330_class_init,
+};
+
+static void pl330_register_types(void)
+{
+ type_register_static(&pl330_type_info);
+}
+
+type_init(pl330_register_types)
--
1.7.0.4
^ permalink raw reply related [flat|nested] 10+ messages in thread