SH: r2d pci support (Takashi YOSHII).

This patch adds pci support to sh/r2d board.
This is the first user of PCIC support I formerly sent.

PCIC actually is inside of chip with CPU core on SH7751.
But, this code is written as if SH7750 and PCIC are on board.
I care little about physical device boundary, but fitting with qemu's
design.

This patch also adds some BSC (Bus State Controller) registers,
because PCI device driver software have to accesses them.
Signed-off-by: NTakashi YOSHII <takasi-y@ops.dti.ne.jp>
Signed-off-by: NAndrzej Zaborowski <andrew.zaborowski@intel.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5932 c046a42c-6fe2-441c-8c8c-71466251a162

hw/r2d.c

@@ -28,6 +28,9 @@
 #include "devices.h"
 #include "sysemu.h"
 #include "boards.h"
+#include "pci.h"
+#include "net.h"
+#include "sh7750_regs.h"
 
 #define SDRAM_BASE 0x0c000000 /* Physical location of SDRAM: Area 3 */
 #define SDRAM_SIZE 0x04000000
@@ -178,6 +181,17 @@ static qemu_irq *r2d_fpga_init(target_phys_addr_t base, qemu_irq irl)
     return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
 }
 
+static void r2d_pci_set_irq(qemu_irq *p, int n, int l)
+{
+    qemu_set_irq(p[n], l);
+}
+
+static int r2d_pci_map_irq(PCIDevice *d, int irq_num)
+{
+    const int intx[] = { PCI_INTA, PCI_INTB, PCI_INTC, PCI_INTD };
+    return intx[d->devfn >> 3];
+}
+
 static void r2d_init(ram_addr_t ram_size, int vga_ram_size,
               const char *boot_device, DisplayState * ds,
 	      const char *kernel_filename, const char *kernel_cmdline,
@@ -187,6 +201,8 @@ static void r2d_init(ram_addr_t ram_size, int vga_ram_size,
     struct SH7750State *s;
     ram_addr_t sdram_addr, sm501_vga_ram_addr;
     qemu_irq *irq;
+    PCIBus *pci;
+    int i;
 
     if (!cpu_model)
         cpu_model = "SH7751R";
@@ -203,6 +219,7 @@ static void r2d_init(ram_addr_t ram_size, int vga_ram_size,
     /* Register peripherals */
     s = sh7750_init(env);
     irq = r2d_fpga_init(0x04000000, sh7750_irl(s));
+    pci = sh_pci_register_bus(r2d_pci_set_irq, r2d_pci_map_irq, irq, 0, 4);
 
     sm501_vga_ram_addr = qemu_ram_alloc(SM501_VRAM_SIZE);
     sm501_init(ds, 0x10000000, sm501_vga_ram_addr, SM501_VRAM_SIZE,
@@ -212,9 +229,19 @@ static void r2d_init(ram_addr_t ram_size, int vga_ram_size,
     mmio_ide_init(0x14001000, 0x1400080c, irq[CF_IDE], 1,
         drives_table[drive_get_index(IF_IDE, 0, 0)].bdrv, NULL);
 
+    /* NIC: rtl8139 on-board, and 2 slots. */
+    pci_rtl8139_init(pci, &nd_table[0], 2 << 3);
+    for (i = 1; i < nb_nics; i++)
+        pci_nic_init(pci, &nd_table[i], -1);
+
     /* Todo: register on board registers */
     {
       int kernel_size;
+      /* initialization which should be done by firmware */
+      uint32_t bcr1 = 1 << 3; /* cs3 SDRAM */
+      uint16_t bcr2 = 3 << (3 * 2); /* cs3 32-bit */
+      cpu_physical_memory_write(SH7750_BCR1_A7, &bcr1, 4);
+      cpu_physical_memory_write(SH7750_BCR2_A7, &bcr2, 2);
 
       kernel_size = load_image(kernel_filename, phys_ram_base);
 

hw/sh7750.c

@@ -41,6 +41,8 @@ typedef struct SH7750State {
     /* Peripheral frequency in Hz */
     uint32_t periph_freq;
     /* SDRAM controller */
+    uint32_t bcr1;
+    uint32_t bcr2;
     uint16_t rfcr;
     /* IO ports */
     uint16_t gpioic;
@@ -208,6 +210,8 @@ static uint32_t sh7750_mem_readw(void *opaque, target_phys_addr_t addr)
     SH7750State *s = opaque;
 
     switch (addr) {
+    case SH7750_BCR2_A7:
+	return s->bcr2;
     case SH7750_FRQCR_A7:
 	return 0;
     case SH7750_RFCR_A7:
@@ -231,6 +235,15 @@ static uint32_t sh7750_mem_readl(void *opaque, target_phys_addr_t addr)
     SH7750State *s = opaque;
 
     switch (addr) {
+    case SH7750_BCR1_A7:
+	return s->bcr1;
+    case SH7750_BCR4_A7:
+    case SH7750_WCR1_A7:
+    case SH7750_WCR2_A7:
+    case SH7750_WCR3_A7:
+    case SH7750_MCR_A7:
+        ignore_access("long read", addr);
+        return 0;
     case SH7750_MMUCR_A7:
 	return s->cpu->mmucr;
     case SH7750_PTEH_A7:
@@ -285,6 +298,8 @@ static void sh7750_mem_writew(void *opaque, target_phys_addr_t addr,
     switch (addr) {
 	/* SDRAM controller */
     case SH7750_BCR2_A7:
+        s->bcr2 = mem_value;
+        return;
     case SH7750_BCR3_A7:
     case SH7750_RTCOR_A7:
     case SH7750_RTCNT_A7:
@@ -331,6 +346,8 @@ static void sh7750_mem_writel(void *opaque, target_phys_addr_t addr,
     switch (addr) {
 	/* SDRAM controller */
     case SH7750_BCR1_A7:
+        s->bcr1 = mem_value;
+        return;
     case SH7750_BCR4_A7:
     case SH7750_WCR1_A7:
     case SH7750_WCR2_A7: