kvm/powerpc: Add freescale pci controller's support

This patch add the emulation of freescale's pci controller for MPC85xx platform.

Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6661 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 365 insertions, 0 deletions

diff --git a/hw/ppce500_pci.c b/hw/ppce500_pci.c
new file mode 100644
index 0000000..d5892e8
--- /dev/null
+++ b/hw/ppce500_pci.c
@@ -0,0 +1,365 @@
+/*
+ * QEMU PowerPC E500 embedded processors pci controller emulation
+ *
+ * Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author: Yu Liu,     <yu.liu@freescale.com>
+ *
+ * This file is derived from hw/ppc4xx_pci.c,
+ * the copyright for that material belongs to the original owners.
+ *
+ * This 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;  either version 2 of the  License, or
+ * (at your option) any later version.
+ */
+
+#include "hw.h"
+#include "ppc.h"
+#include "ppce500.h"
+typedef target_phys_addr_t pci_addr_t;
+#include "pci.h"
+#include "pci_host.h"
+#include "bswap.h"
+#include "qemu-log.h"
+
+#ifdef DEBUG_PCI
+#define pci_debug(fmt, arg...) fprintf(stderr, fmt, ##arg)
+#else
+#define pci_debug(fmt, arg...)
+#endif
+
+#define PCIE500_CFGADDR       0x0
+#define PCIE500_CFGDATA       0x4
+#define PCIE500_REG_BASE      0xC00
+#define PCIE500_REG_SIZE      (0x1000 - PCIE500_REG_BASE)
+
+#define PPCE500_PCI_CONFIG_ADDR         0x0
+#define PPCE500_PCI_CONFIG_DATA         0x4
+#define PPCE500_PCI_INTACK              0x8
+
+#define PPCE500_PCI_OW1                 (0xC20 - PCIE500_REG_BASE)
+#define PPCE500_PCI_OW2                 (0xC40 - PCIE500_REG_BASE)
+#define PPCE500_PCI_OW3                 (0xC60 - PCIE500_REG_BASE)
+#define PPCE500_PCI_OW4                 (0xC80 - PCIE500_REG_BASE)
+#define PPCE500_PCI_IW3                 (0xDA0 - PCIE500_REG_BASE)
+#define PPCE500_PCI_IW2                 (0xDC0 - PCIE500_REG_BASE)
+#define PPCE500_PCI_IW1                 (0xDE0 - PCIE500_REG_BASE)
+
+#define PPCE500_PCI_GASKET_TIMR         (0xE20 - PCIE500_REG_BASE)
+
+#define PCI_POTAR               0x0
+#define PCI_POTEAR              0x4
+#define PCI_POWBAR              0x8
+#define PCI_POWAR               0x10
+
+#define PCI_PITAR               0x0
+#define PCI_PIWBAR              0x8
+#define PCI_PIWBEAR             0xC
+#define PCI_PIWAR               0x10
+
+#define PPCE500_PCI_NR_POBS     5
+#define PPCE500_PCI_NR_PIBS     3
+
+struct  pci_outbound {
+    uint32_t potar;
+    uint32_t potear;
+    uint32_t powbar;
+    uint32_t powar;
+};
+
+struct pci_inbound {
+    uint32_t pitar;
+    uint32_t piwbar;
+    uint32_t piwbear;
+    uint32_t piwar;
+};
+
+struct PPCE500PCIState {
+    struct pci_outbound pob[PPCE500_PCI_NR_POBS];
+    struct pci_inbound pib[PPCE500_PCI_NR_PIBS];
+    uint32_t gasket_time;
+    PCIHostState pci_state;
+    PCIDevice *pci_dev;
+};
+
+typedef struct PPCE500PCIState PPCE500PCIState;
+
+static uint32_t pcie500_cfgaddr_readl(void *opaque, target_phys_addr_t addr)
+{
+    PPCE500PCIState *pci = opaque;
+
+    pci_debug("%s: (addr:%Lx) -> value:%x\n", __func__, addr,
+                    pci->pci_state.config_reg);
+    return pci->pci_state.config_reg;
+}
+
+static CPUReadMemoryFunc *pcie500_cfgaddr_read[] = {
+    &pcie500_cfgaddr_readl,
+    &pcie500_cfgaddr_readl,
+    &pcie500_cfgaddr_readl,
+};
+
+static void pcie500_cfgaddr_writel(void *opaque, target_phys_addr_t addr,
+                                  uint32_t value)
+{
+    PPCE500PCIState *controller = opaque;
+
+    pci_debug("%s: value:%x -> (addr%Lx)\n", __func__, value, addr);
+    controller->pci_state.config_reg = value & ~0x3;
+}
+
+static CPUWriteMemoryFunc *pcie500_cfgaddr_write[] = {
+    &pcie500_cfgaddr_writel,
+    &pcie500_cfgaddr_writel,
+    &pcie500_cfgaddr_writel,
+};
+
+static CPUReadMemoryFunc *pcie500_cfgdata_read[] = {
+    &pci_host_data_readb,
+    &pci_host_data_readw,
+    &pci_host_data_readl,
+};
+
+static CPUWriteMemoryFunc *pcie500_cfgdata_write[] = {
+    &pci_host_data_writeb,
+    &pci_host_data_writew,
+    &pci_host_data_writel,
+};
+
+static uint32_t pci_reg_read4(void *opaque, target_phys_addr_t addr)
+{
+    PPCE500PCIState *pci = opaque;
+    unsigned long win;
+    uint32_t value = 0;
+
+    win = addr & 0xfe0;
+
+    switch (win) {
+    case PPCE500_PCI_OW1:
+    case PPCE500_PCI_OW2:
+    case PPCE500_PCI_OW3:
+    case PPCE500_PCI_OW4:
+        switch (addr & 0xC) {
+        case PCI_POTAR: value = pci->pob[(addr >> 5) & 0x7].potar; break;
+        case PCI_POTEAR: value = pci->pob[(addr >> 5) & 0x7].potear; break;
+        case PCI_POWBAR: value = pci->pob[(addr >> 5) & 0x7].powbar; break;
+        case PCI_POWAR: value = pci->pob[(addr >> 5) & 0x7].powar; break;
+        default: break;
+        }
+        break;
+
+    case PPCE500_PCI_IW3:
+    case PPCE500_PCI_IW2:
+    case PPCE500_PCI_IW1:
+        switch (addr & 0xC) {
+        case PCI_PITAR: value = pci->pib[(addr >> 5) & 0x3].pitar; break;
+        case PCI_PIWBAR: value = pci->pib[(addr >> 5) & 0x3].piwbar; break;
+        case PCI_PIWBEAR: value = pci->pib[(addr >> 5) & 0x3].piwbear; break;
+        case PCI_PIWAR: value = pci->pib[(addr >> 5) & 0x3].piwar; break;
+        default: break;
+        };
+        break;
+
+    case PPCE500_PCI_GASKET_TIMR:
+        value = pci->gasket_time;
+        break;
+
+    default:
+        break;
+    }
+
+    pci_debug("%s: win:%lx(addr:%Lx) -> value:%x\n",__func__,win,addr,value);
+    return value;
+}
+
+static CPUReadMemoryFunc *e500_pci_reg_read[] = {
+    &pci_reg_read4,
+    &pci_reg_read4,
+    &pci_reg_read4,
+};
+
+static void pci_reg_write4(void *opaque, target_phys_addr_t addr,
+                               uint32_t value)
+{
+    PPCE500PCIState *pci = opaque;
+    unsigned long win;
+
+    win = addr & 0xfe0;
+
+    pci_debug("%s: value:%x -> win:%lx(addr:%Lx)\n",__func__,value,win,addr);
+
+    switch (win) {
+    case PPCE500_PCI_OW1:
+    case PPCE500_PCI_OW2:
+    case PPCE500_PCI_OW3:
+    case PPCE500_PCI_OW4:
+        switch (addr & 0xC) {
+        case PCI_POTAR: pci->pob[(addr >> 5) & 0x7].potar = value; break;
+        case PCI_POTEAR: pci->pob[(addr >> 5) & 0x7].potear = value; break;
+        case PCI_POWBAR: pci->pob[(addr >> 5) & 0x7].powbar = value; break;
+        case PCI_POWAR: pci->pob[(addr >> 5) & 0x7].powar = value; break;
+        default: break;
+        };
+        break;
+
+    case PPCE500_PCI_IW3:
+    case PPCE500_PCI_IW2:
+    case PPCE500_PCI_IW1:
+        switch (addr & 0xC) {
+        case PCI_PITAR: pci->pib[(addr >> 5) & 0x3].pitar = value; break;
+        case PCI_PIWBAR: pci->pib[(addr >> 5) & 0x3].piwbar = value; break;
+        case PCI_PIWBEAR: pci->pib[(addr >> 5) & 0x3].piwbear = value; break;
+        case PCI_PIWAR: pci->pib[(addr >> 5) & 0x3].piwar = value; break;
+        default: break;
+        };
+        break;
+
+    case PPCE500_PCI_GASKET_TIMR:
+        pci->gasket_time = value;
+        break;
+
+    default:
+        break;
+    };
+}
+
+static CPUWriteMemoryFunc *e500_pci_reg_write[] = {
+    &pci_reg_write4,
+    &pci_reg_write4,
+    &pci_reg_write4,
+};
+
+static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
+{
+    int devno = pci_dev->devfn >> 3, ret = 0;
+
+    switch (devno) {
+        /* Two PCI slot */
+        case 0x11:
+        case 0x12:
+            ret = (irq_num + devno - 0x10) % 4;
+            break;
+        default:
+            printf("Error:%s:unknow dev number\n", __func__);
+    }
+
+    pci_debug("%s: devfn %x irq %d -> %d  devno:%x\n", __func__,
+           pci_dev->devfn, irq_num, ret, devno);
+
+    return ret;
+}
+
+static void mpc85xx_pci_set_irq(qemu_irq *pic, int irq_num, int level)
+{
+    pci_debug("%s: PCI irq %d, level:%d\n", __func__, irq_num, level);
+
+    qemu_set_irq(pic[irq_num], level);
+}
+
+static void ppce500_pci_save(QEMUFile *f, void *opaque)
+{
+    PPCE500PCIState *controller = opaque;
+    int i;
+
+    pci_device_save(controller->pci_dev, f);
+
+    for (i = 0; i < PPCE500_PCI_NR_POBS; i++) {
+        qemu_put_be32s(f, &controller->pob[i].potar);
+        qemu_put_be32s(f, &controller->pob[i].potear);
+        qemu_put_be32s(f, &controller->pob[i].powbar);
+        qemu_put_be32s(f, &controller->pob[i].powar);
+    }
+
+    for (i = 0; i < PPCE500_PCI_NR_PIBS; i++) {
+        qemu_put_be32s(f, &controller->pib[i].pitar);
+        qemu_put_be32s(f, &controller->pib[i].piwbar);
+        qemu_put_be32s(f, &controller->pib[i].piwbear);
+        qemu_put_be32s(f, &controller->pib[i].piwar);
+    }
+    qemu_put_be32s(f, &controller->gasket_time);
+}
+
+static int ppce500_pci_load(QEMUFile *f, void *opaque, int version_id)
+{
+    PPCE500PCIState *controller = opaque;
+    int i;
+
+    if (version_id != 1)
+        return -EINVAL;
+
+    pci_device_load(controller->pci_dev, f);
+
+    for (i = 0; i < PPCE500_PCI_NR_POBS; i++) {
+        qemu_get_be32s(f, &controller->pob[i].potar);
+        qemu_get_be32s(f, &controller->pob[i].potear);
+        qemu_get_be32s(f, &controller->pob[i].powbar);
+        qemu_get_be32s(f, &controller->pob[i].powar);
+    }
+
+    for (i = 0; i < PPCE500_PCI_NR_PIBS; i++) {
+        qemu_get_be32s(f, &controller->pib[i].pitar);
+        qemu_get_be32s(f, &controller->pib[i].piwbar);
+        qemu_get_be32s(f, &controller->pib[i].piwbear);
+        qemu_get_be32s(f, &controller->pib[i].piwar);
+    }
+    qemu_get_be32s(f, &controller->gasket_time);
+
+    return 0;
+}
+
+PCIBus *ppce500_pci_init(qemu_irq pci_irqs[4], target_phys_addr_t registers)
+{
+    PPCE500PCIState *controller;
+    PCIDevice *d;
+    int index;
+    static int ppce500_pci_id;
+
+    controller = qemu_mallocz(sizeof(PPCE500PCIState));
+
+    controller->pci_state.bus = pci_register_bus(mpc85xx_pci_set_irq,
+                                                 mpc85xx_pci_map_irq,
+                                                 pci_irqs, 0x88, 4);
+    d = pci_register_device(controller->pci_state.bus,
+                            "host bridge", sizeof(PCIDevice),
+                            0, NULL, NULL);
+
+    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_FSL);
+    pci_config_set_device_id(d->config, PCI_DEVICE_ID_FSL_E500);
+    pci_config_set_class(d->config, PCI_CLASS_PROCESSOR_POWERPC);
+
+    controller->pci_dev = d;
+
+    /* CFGADDR */
+    index = cpu_register_io_memory(0, pcie500_cfgaddr_read,
+                                   pcie500_cfgaddr_write, controller);
+    if (index < 0)
+        goto free;
+    cpu_register_physical_memory(registers + PCIE500_CFGADDR, 4, index);
+
+    /* CFGDATA */
+    index = cpu_register_io_memory(0, pcie500_cfgdata_read,
+                                   pcie500_cfgdata_write,
+                                   &controller->pci_state);
+    if (index < 0)
+        goto free;
+    cpu_register_physical_memory(registers + PCIE500_CFGDATA, 4, index);
+
+    index = cpu_register_io_memory(0, e500_pci_reg_read,
+                                   e500_pci_reg_write, controller);
+    if (index < 0)
+        goto free;
+    cpu_register_physical_memory(registers + PCIE500_REG_BASE,
+                                   PCIE500_REG_SIZE, index);
+
+    /* XXX load/save code not tested. */
+    register_savevm("ppce500_pci", ppce500_pci_id++, 1,
+                    ppce500_pci_save, ppce500_pci_load, controller);
+
+    return controller->pci_state.bus;
+
+free:
+    printf("%s error\n", __func__);
+    qemu_free(controller);
+    return NULL;
+}