Share devices that might be useful for all PowerPC 40x & 440 implementations

 (mostly CPU registration and UIC, for now).


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3340 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 534 insertions, 0 deletions

diff --git a/hw/ppc4xx_devs.c b/hw/ppc4xx_devs.c
new file mode 100644
index 0000000000..8cefd74703
--- /dev/null
+++ b/hw/ppc4xx_devs.c
@@ -0,0 +1,534 @@
+/*
+ * QEMU PowerPC 4xx embedded processors shared devices emulation
+ *
+ * Copyright (c) 2007 Jocelyn Mayer
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "vl.h"
+#include "ppc4xx.h"
+
+extern int loglevel;
+extern FILE *logfile;
+
+//#define DEBUG_MMIO
+#define DEBUG_UIC
+
+/*****************************************************************************/
+/* Generic PowerPC 4xx processor instanciation */
+CPUState *ppc4xx_init (const unsigned char *cpu_model,
+                       clk_setup_t *cpu_clk, clk_setup_t *tb_clk,
+                       uint32_t sysclk)
+{
+    CPUState *env;
+    ppc_def_t *def;
+
+    /* init CPUs */
+    env = cpu_init();
+    ppc_find_by_name(cpu_model, &def);
+    if (def == NULL) {
+        cpu_abort(env, "Unable to find PowerPC %s CPU definition\n",
+                  cpu_model);
+    }
+    cpu_ppc_register(env, def);
+    cpu_ppc_reset(env);
+    cpu_clk->cb = NULL; /* We don't care about CPU clock frequency changes */
+    cpu_clk->opaque = env;
+    /* Set time-base frequency to sysclk */
+    tb_clk->cb = ppc_emb_timers_init(env, sysclk);
+    tb_clk->opaque = env;
+    ppc_dcr_init(env, NULL, NULL);
+    /* Register qemu callbacks */
+    qemu_register_reset(&cpu_ppc_reset, env);
+    register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
+
+    return env;
+}
+
+/*****************************************************************************/
+/* Fake device used to map multiple devices in a single memory page */
+#define MMIO_AREA_BITS 8
+#define MMIO_AREA_LEN (1 << MMIO_AREA_BITS)
+#define MMIO_AREA_NB (1 << (TARGET_PAGE_BITS - MMIO_AREA_BITS))
+#define MMIO_IDX(addr) (((addr) >> MMIO_AREA_BITS) & (MMIO_AREA_NB - 1))
+struct ppc4xx_mmio_t {
+    target_phys_addr_t base;
+    CPUReadMemoryFunc **mem_read[MMIO_AREA_NB];
+    CPUWriteMemoryFunc **mem_write[MMIO_AREA_NB];
+    void *opaque[MMIO_AREA_NB];
+};
+
+static uint32_t unassigned_mmio_readb (void *opaque, target_phys_addr_t addr)
+{
+#ifdef DEBUG_UNASSIGNED
+    ppc4xx_mmio_t *mmio;
+
+    mmio = opaque;
+    printf("Unassigned mmio read 0x" PADDRX " base " PADDRX "\n",
+           addr, mmio->base);
+#endif
+
+    return 0;
+}
+
+static void unassigned_mmio_writeb (void *opaque,
+                                    target_phys_addr_t addr, uint32_t val)
+{
+#ifdef DEBUG_UNASSIGNED
+    ppc4xx_mmio_t *mmio;
+
+    mmio = opaque;
+    printf("Unassigned mmio write 0x" PADDRX " = 0x%x base " PADDRX "\n",
+           addr, val, mmio->base);
+#endif
+}
+
+static CPUReadMemoryFunc *unassigned_mmio_read[3] = {
+    unassigned_mmio_readb,
+    unassigned_mmio_readb,
+    unassigned_mmio_readb,
+};
+
+static CPUWriteMemoryFunc *unassigned_mmio_write[3] = {
+    unassigned_mmio_writeb,
+    unassigned_mmio_writeb,
+    unassigned_mmio_writeb,
+};
+
+static uint32_t mmio_readlen (ppc4xx_mmio_t *mmio,
+                              target_phys_addr_t addr, int len)
+{
+    CPUReadMemoryFunc **mem_read;
+    uint32_t ret;
+    int idx;
+
+    idx = MMIO_IDX(addr - mmio->base);
+#if defined(DEBUG_MMIO)
+    printf("%s: mmio %p len %d addr " PADDRX " idx %d\n", __func__,
+           mmio, len, addr, idx);
+#endif
+    mem_read = mmio->mem_read[idx];
+    ret = (*mem_read[len])(mmio->opaque[idx], addr - mmio->base);
+
+    return ret;
+}
+
+static void mmio_writelen (ppc4xx_mmio_t *mmio,
+                           target_phys_addr_t addr, uint32_t value, int len)
+{
+    CPUWriteMemoryFunc **mem_write;
+    int idx;
+
+    idx = MMIO_IDX(addr - mmio->base);
+#if defined(DEBUG_MMIO)
+    printf("%s: mmio %p len %d addr " PADDRX " idx %d value %08x\n", __func__,
+           mmio, len, addr, idx, value);
+#endif
+    mem_write = mmio->mem_write[idx];
+    (*mem_write[len])(mmio->opaque[idx], addr - mmio->base, value);
+}
+
+static uint32_t mmio_readb (void *opaque, target_phys_addr_t addr)
+{
+#if defined(DEBUG_MMIO)
+    printf("%s: addr " PADDRX "\n", __func__, addr);
+#endif
+
+    return mmio_readlen(opaque, addr, 0);
+}
+
+static void mmio_writeb (void *opaque,
+                         target_phys_addr_t addr, uint32_t value)
+{
+#if defined(DEBUG_MMIO)
+    printf("%s: addr " PADDRX " val %08x\n", __func__, addr, value);
+#endif
+    mmio_writelen(opaque, addr, value, 0);
+}
+
+static uint32_t mmio_readw (void *opaque, target_phys_addr_t addr)
+{
+#if defined(DEBUG_MMIO)
+    printf("%s: addr " PADDRX "\n", __func__, addr);
+#endif
+
+    return mmio_readlen(opaque, addr, 1);
+}
+
+static void mmio_writew (void *opaque,
+                         target_phys_addr_t addr, uint32_t value)
+{
+#if defined(DEBUG_MMIO)
+    printf("%s: addr " PADDRX " val %08x\n", __func__, addr, value);
+#endif
+    mmio_writelen(opaque, addr, value, 1);
+}
+
+static uint32_t mmio_readl (void *opaque, target_phys_addr_t addr)
+{
+#if defined(DEBUG_MMIO)
+    printf("%s: addr " PADDRX "\n", __func__, addr);
+#endif
+
+    return mmio_readlen(opaque, addr, 2);
+}
+
+static void mmio_writel (void *opaque,
+                         target_phys_addr_t addr, uint32_t value)
+{
+#if defined(DEBUG_MMIO)
+    printf("%s: addr " PADDRX " val %08x\n", __func__, addr, value);
+#endif
+    mmio_writelen(opaque, addr, value, 2);
+}
+
+static CPUReadMemoryFunc *mmio_read[] = {
+    &mmio_readb,
+    &mmio_readw,
+    &mmio_readl,
+};
+
+static CPUWriteMemoryFunc *mmio_write[] = {
+    &mmio_writeb,
+    &mmio_writew,
+    &mmio_writel,
+};
+
+int ppc4xx_mmio_register (CPUState *env, ppc4xx_mmio_t *mmio,
+                          target_phys_addr_t offset, uint32_t len,
+                          CPUReadMemoryFunc **mem_read,
+                          CPUWriteMemoryFunc **mem_write, void *opaque)
+{
+    uint32_t end;
+    int idx, eidx;
+
+    if ((offset + len) > TARGET_PAGE_SIZE)
+        return -1;
+    idx = MMIO_IDX(offset);
+    end = offset + len - 1;
+    eidx = MMIO_IDX(end);
+#if defined(DEBUG_MMIO)
+    printf("%s: offset %08x len %08x %08x %d %d\n", __func__, offset, len,
+           end, idx, eidx);
+#endif
+    for (; idx <= eidx; idx++) {
+        mmio->mem_read[idx] = mem_read;
+        mmio->mem_write[idx] = mem_write;
+        mmio->opaque[idx] = opaque;
+    }
+
+    return 0;
+}
+
+ppc4xx_mmio_t *ppc4xx_mmio_init (CPUState *env, target_phys_addr_t base)
+{
+    ppc4xx_mmio_t *mmio;
+    int mmio_memory;
+
+    mmio = qemu_mallocz(sizeof(ppc4xx_mmio_t));
+    if (mmio != NULL) {
+        mmio->base = base;
+        mmio_memory = cpu_register_io_memory(0, mmio_read, mmio_write, mmio);
+#if defined(DEBUG_MMIO)
+        printf("%s: %p base %08x len %08x %d\n", __func__,
+               mmio, base, TARGET_PAGE_SIZE, mmio_memory);
+#endif
+        cpu_register_physical_memory(base, TARGET_PAGE_SIZE, mmio_memory);
+        ppc4xx_mmio_register(env, mmio, 0, TARGET_PAGE_SIZE,
+                             unassigned_mmio_read, unassigned_mmio_write,
+                             mmio);
+    }
+
+    return mmio;
+}
+
+/*****************************************************************************/
+/* "Universal" Interrupt controller */
+enum {
+    DCR_UICSR  = 0x000,
+    DCR_UICSRS = 0x001,
+    DCR_UICER  = 0x002,
+    DCR_UICCR  = 0x003,
+    DCR_UICPR  = 0x004,
+    DCR_UICTR  = 0x005,
+    DCR_UICMSR = 0x006,
+    DCR_UICVR  = 0x007,
+    DCR_UICVCR = 0x008,
+    DCR_UICMAX = 0x009,
+};
+
+#define UIC_MAX_IRQ 32
+typedef struct ppcuic_t ppcuic_t;
+struct ppcuic_t {
+    uint32_t dcr_base;
+    int use_vectors;
+    uint32_t uicsr;  /* Status register */
+    uint32_t uicer;  /* Enable register */
+    uint32_t uiccr;  /* Critical register */
+    uint32_t uicpr;  /* Polarity register */
+    uint32_t uictr;  /* Triggering register */
+    uint32_t uicvcr; /* Vector configuration register */
+    uint32_t uicvr;
+    qemu_irq *irqs;
+};
+
+static void ppcuic_trigger_irq (ppcuic_t *uic)
+{
+    uint32_t ir, cr;
+    int start, end, inc, i;
+
+    /* Trigger interrupt if any is pending */
+    ir = uic->uicsr & uic->uicer & (~uic->uiccr);
+    cr = uic->uicsr & uic->uicer & uic->uiccr;
+#ifdef DEBUG_UIC
+    if (loglevel & CPU_LOG_INT) {
+        fprintf(logfile, "%s: uicsr %08x uicer %08x uiccr %08x\n"
+                "   %08x ir %08x cr %08x\n", __func__,
+                uic->uicsr, uic->uicer, uic->uiccr,
+                uic->uicsr & uic->uicer, ir, cr);
+    }
+#endif
+    if (ir != 0x0000000) {
+#ifdef DEBUG_UIC
+        if (loglevel & CPU_LOG_INT) {
+            fprintf(logfile, "Raise UIC interrupt\n");
+        }
+#endif
+        qemu_irq_raise(uic->irqs[PPCUIC_OUTPUT_INT]);
+    } else {
+#ifdef DEBUG_UIC
+        if (loglevel & CPU_LOG_INT) {
+            fprintf(logfile, "Lower UIC interrupt\n");
+        }
+#endif
+        qemu_irq_lower(uic->irqs[PPCUIC_OUTPUT_INT]);
+    }
+    /* Trigger critical interrupt if any is pending and update vector */
+    if (cr != 0x0000000) {
+        qemu_irq_raise(uic->irqs[PPCUIC_OUTPUT_CINT]);
+        if (uic->use_vectors) {
+            /* Compute critical IRQ vector */
+            if (uic->uicvcr & 1) {
+                start = 31;
+                end = 0;
+                inc = -1;
+            } else {
+                start = 0;
+                end = 31;
+                inc = 1;
+            }
+            uic->uicvr = uic->uicvcr & 0xFFFFFFFC;
+            for (i = start; i <= end; i += inc) {
+                if (cr & (1 << i)) {
+                    uic->uicvr += (i - start) * 512 * inc;
+                    break;
+                }
+            }
+        }
+#ifdef DEBUG_UIC
+        if (loglevel & CPU_LOG_INT) {
+            fprintf(logfile, "Raise UIC critical interrupt - vector %08x\n",
+                    uic->uicvr);
+        }
+#endif
+    } else {
+#ifdef DEBUG_UIC
+        if (loglevel & CPU_LOG_INT) {
+            fprintf(logfile, "Lower UIC critical interrupt\n");
+        }
+#endif
+        qemu_irq_lower(uic->irqs[PPCUIC_OUTPUT_CINT]);
+        uic->uicvr = 0x00000000;
+    }
+}
+
+static void ppcuic_set_irq (void *opaque, int irq_num, int level)
+{
+    ppcuic_t *uic;
+    uint32_t mask, sr;
+
+    uic = opaque;
+    mask = 1 << irq_num;
+#ifdef DEBUG_UIC
+    if (loglevel & CPU_LOG_INT) {
+        fprintf(logfile, "%s: irq %d level %d uicsr %08x mask %08x => %08x "
+                "%08x\n", __func__, irq_num, level,
+                uic->uicsr, mask, uic->uicsr & mask, level << irq_num);
+    }
+#endif
+    if (irq_num < 0 || irq_num > 31)
+        return;
+    sr = uic->uicsr;
+    if (!(uic->uicpr & mask)) {
+        /* Negatively asserted IRQ */
+        level = level == 0 ? 1 : 0;
+    }
+    /* Update status register */
+    if (uic->uictr & mask) {
+        /* Edge sensitive interrupt */
+        if (level == 1)
+            uic->uicsr |= mask;
+    } else {
+        /* Level sensitive interrupt */
+        if (level == 1)
+            uic->uicsr |= mask;
+        else
+            uic->uicsr &= ~mask;
+    }
+#ifdef DEBUG_UIC
+    if (loglevel & CPU_LOG_INT) {
+        fprintf(logfile, "%s: irq %d level %d sr %08x => %08x\n", __func__,
+                irq_num, level, uic->uicsr, sr);
+    }
+#endif
+    if (sr != uic->uicsr)
+        ppcuic_trigger_irq(uic);
+}
+
+static target_ulong dcr_read_uic (void *opaque, int dcrn)
+{
+    ppcuic_t *uic;
+    target_ulong ret;
+
+    uic = opaque;
+    dcrn -= uic->dcr_base;
+    switch (dcrn) {
+    case DCR_UICSR:
+    case DCR_UICSRS:
+        ret = uic->uicsr;
+        break;
+    case DCR_UICER:
+        ret = uic->uicer;
+        break;
+    case DCR_UICCR:
+        ret = uic->uiccr;
+        break;
+    case DCR_UICPR:
+        ret = uic->uicpr;
+        break;
+    case DCR_UICTR:
+        ret = uic->uictr;
+        break;
+    case DCR_UICMSR:
+        ret = uic->uicsr & uic->uicer;
+        break;
+    case DCR_UICVR:
+        if (!uic->use_vectors)
+            goto no_read;
+        ret = uic->uicvr;
+        break;
+    case DCR_UICVCR:
+        if (!uic->use_vectors)
+            goto no_read;
+        ret = uic->uicvcr;
+        break;
+    default:
+    no_read:
+        ret = 0x00000000;
+        break;
+    }
+
+    return ret;
+}
+
+static void dcr_write_uic (void *opaque, int dcrn, target_ulong val)
+{
+    ppcuic_t *uic;
+
+    uic = opaque;
+    dcrn -= uic->dcr_base;
+#ifdef DEBUG_UIC
+    if (loglevel & CPU_LOG_INT) {
+        fprintf(logfile, "%s: dcr %d val " ADDRX "\n", __func__, dcrn, val);
+    }
+#endif
+    switch (dcrn) {
+    case DCR_UICSR:
+        uic->uicsr &= ~val;
+        ppcuic_trigger_irq(uic);
+        break;
+    case DCR_UICSRS:
+        uic->uicsr |= val;
+        ppcuic_trigger_irq(uic);
+        break;
+    case DCR_UICER:
+        uic->uicer = val;
+        ppcuic_trigger_irq(uic);
+        break;
+    case DCR_UICCR:
+        uic->uiccr = val;
+        ppcuic_trigger_irq(uic);
+        break;
+    case DCR_UICPR:
+        uic->uicpr = val;
+        ppcuic_trigger_irq(uic);
+        break;
+    case DCR_UICTR:
+        uic->uictr = val;
+        ppcuic_trigger_irq(uic);
+        break;
+    case DCR_UICMSR:
+        break;
+    case DCR_UICVR:
+        break;
+    case DCR_UICVCR:
+        uic->uicvcr = val & 0xFFFFFFFD;
+        ppcuic_trigger_irq(uic);
+        break;
+    }
+}
+
+static void ppcuic_reset (void *opaque)
+{
+    ppcuic_t *uic;
+
+    uic = opaque;
+    uic->uiccr = 0x00000000;
+    uic->uicer = 0x00000000;
+    uic->uicpr = 0x00000000;
+    uic->uicsr = 0x00000000;
+    uic->uictr = 0x00000000;
+    if (uic->use_vectors) {
+        uic->uicvcr = 0x00000000;
+        uic->uicvr = 0x0000000;
+    }
+}
+
+qemu_irq *ppcuic_init (CPUState *env, qemu_irq *irqs,
+                       uint32_t dcr_base, int has_ssr, int has_vr)
+{
+    ppcuic_t *uic;
+    int i;
+
+    uic = qemu_mallocz(sizeof(ppcuic_t));
+    if (uic != NULL) {
+        uic->dcr_base = dcr_base;
+        uic->irqs = irqs;
+        if (has_vr)
+            uic->use_vectors = 1;
+        for (i = 0; i < DCR_UICMAX; i++) {
+            ppc_dcr_register(env, dcr_base + i, uic,
+                             &dcr_read_uic, &dcr_write_uic);
+        }
+        qemu_register_reset(ppcuic_reset, uic);
+        ppcuic_reset(uic);
+    }
+
+    return qemu_allocate_irqs(&ppcuic_set_irq, uic, UIC_MAX_IRQ);
+}