hw/r2d.c

   1 /*
   2  * Renesas SH7751R R2D-PLUS emulation
   3  *
   4  * Copyright (c) 2007 Magnus Damm
   5  * Copyright (c) 2008 Paul Mundt
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #include "hw.h"
  27 #include "sh.h"
  28 #include "devices.h"
  29 #include "sysemu.h"
  30 #include "boards.h"
  31 #include "pci.h"
  32 #include "net.h"
  33 #include "sh7750_regs.h"
  34
  35 #define SDRAM_BASE 0x0c000000 /* Physical location of SDRAM: Area 3 */
  36 #define SDRAM_SIZE 0x04000000
  37
  38 #define SM501_VRAM_SIZE 0x800000
  39
  40 #define PA_IRLMSK       0x00
  41 #define PA_POWOFF       0x30
  42 #define PA_VERREG       0x32
  43 #define PA_OUTPORT      0x36
  44
  45 typedef struct {
  46     uint16_t bcr;
  47     uint16_t irlmsk;
  48     uint16_t irlmon;
  49     uint16_t cfctl;
  50     uint16_t cfpow;
  51     uint16_t dispctl;
  52     uint16_t sdmpow;
  53     uint16_t rtcce;
  54     uint16_t pcicd;
  55     uint16_t voyagerrts;
  56     uint16_t cfrst;
  57     uint16_t admrts;
  58     uint16_t extrst;
  59     uint16_t cfcdintclr;
  60     uint16_t keyctlclr;
  61     uint16_t pad0;
  62     uint16_t pad1;
  63     uint16_t powoff;
  64     uint16_t verreg;
  65     uint16_t inport;
  66     uint16_t outport;
  67     uint16_t bverreg;
  68
  69 /* output pin */
  70     qemu_irq irl;
  71 } r2d_fpga_t;
  72
  73 enum r2d_fpga_irq {
  74     PCI_INTD, CF_IDE, CF_CD, PCI_INTC, SM501, KEY, RTC_A, RTC_T,
  75     SDCARD, PCI_INTA, PCI_INTB, EXT, TP,
  76     NR_IRQS
  77 };
  78
  79 static const struct { short irl; uint16_t msk; } irqtab[NR_IRQS] = {
  80     [CF_IDE]    = {  1, 1<<9 },
  81     [CF_CD]     = {  2, 1<<8 },
  82     [PCI_INTA]  = {  9, 1<<14 },
  83     [PCI_INTB]  = { 10, 1<<13 },
  84     [PCI_INTC]  = {  3, 1<<12 },
  85     [PCI_INTD]  = {  0, 1<<11 },
  86     [SM501]     = {  4, 1<<10 },
  87     [KEY]       = {  5, 1<<6 },
  88     [RTC_A]     = {  6, 1<<5 },
  89     [RTC_T]     = {  7, 1<<4 },
  90     [SDCARD]    = {  8, 1<<7 },
  91     [EXT]       = { 11, 1<<0 },
  92     [TP]        = { 12, 1<<15 },
  93 };
  94
  95 static void update_irl(r2d_fpga_t *fpga)
  96 {
  97     int i, irl = 15;
  98     for (i = 0; i < NR_IRQS; i++)
  99         if (fpga->irlmon & fpga->irlmsk & irqtab[i].msk)
 100             if (irqtab[i].irl < irl)
 101                 irl = irqtab[i].irl;
 102     qemu_set_irq(fpga->irl, irl ^ 15);
 103 }
 104
 105 static void r2d_fpga_irq_set(void *opaque, int n, int level)
 106 {
 107     r2d_fpga_t *fpga = opaque;
 108     if (level)
 109         fpga->irlmon |= irqtab[n].msk;
 110     else
 111         fpga->irlmon &= ~irqtab[n].msk;
 112     update_irl(fpga);
 113 }
 114
 115 static uint32_t r2d_fpga_read(void *opaque, target_phys_addr_t addr)
 116 {
 117     r2d_fpga_t *s = opaque;
 118
 119     switch (addr) {
 120     case PA_IRLMSK:
 121         return s->irlmsk;
 122     case PA_OUTPORT:
 123         return s->outport;
 124     case PA_POWOFF:
 125         return s->powoff;
 126     case PA_VERREG:
 127         return 0x10;
 128     }
 129
 130     return 0;
 131 }
 132
 133 static void
 134 r2d_fpga_write(void *opaque, target_phys_addr_t addr, uint32_t value)
 135 {
 136     r2d_fpga_t *s = opaque;
 137
 138     switch (addr) {
 139     case PA_IRLMSK:
 140         s->irlmsk = value;
 141         update_irl(s);
 142         break;
 143     case PA_OUTPORT:
 144         s->outport = value;
 145         break;
 146     case PA_POWOFF:
 147         s->powoff = value;
 148         break;
 149     case PA_VERREG:
 150         /* Discard writes */
 151         break;
 152     }
 153 }
 154
 155 static CPUReadMemoryFunc *r2d_fpga_readfn[] = {
 156     r2d_fpga_read,
 157     r2d_fpga_read,
 158     NULL,
 159 };
 160
 161 static CPUWriteMemoryFunc *r2d_fpga_writefn[] = {
 162     r2d_fpga_write,
 163     r2d_fpga_write,
 164     NULL,
 165 };
 166
 167 static qemu_irq *r2d_fpga_init(target_phys_addr_t base, qemu_irq irl)
 168 {
 169     int iomemtype;
 170     r2d_fpga_t *s;
 171
 172     s = qemu_mallocz(sizeof(r2d_fpga_t));
 173     if (!s)
 174         return NULL;
 175
 176     s->irl = irl;
 177
 178     iomemtype = cpu_register_io_memory(0, r2d_fpga_readfn,
 179                                        r2d_fpga_writefn, s);
 180     cpu_register_physical_memory(base, 0x40, iomemtype);
 181     return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
 182 }
 183
 184 static void r2d_pci_set_irq(qemu_irq *p, int n, int l)
 185 {
 186     qemu_set_irq(p[n], l);
 187 }
 188
 189 static int r2d_pci_map_irq(PCIDevice *d, int irq_num)
 190 {
 191     const int intx[] = { PCI_INTA, PCI_INTB, PCI_INTC, PCI_INTD };
 192     return intx[d->devfn >> 3];
 193 }
 194
 195 static void r2d_init(ram_addr_t ram_size, int vga_ram_size,
 196               const char *boot_device,
 197               const char *kernel_filename, const char *kernel_cmdline,
 198               const char *initrd_filename, const char *cpu_model)
 199 {
 200     CPUState *env;
 201     struct SH7750State *s;
 202     ram_addr_t sdram_addr, sm501_vga_ram_addr;
 203     qemu_irq *irq;
 204     PCIBus *pci;
 205     int i;
 206
 207     if (!cpu_model)
 208         cpu_model = "SH7751R";
 209
 210     env = cpu_init(cpu_model);
 211     if (!env) {
 212         fprintf(stderr, "Unable to find CPU definition\n");
 213         exit(1);
 214     }
 215
 216     /* Allocate memory space */
 217     sdram_addr = qemu_ram_alloc(SDRAM_SIZE);
 218     cpu_register_physical_memory(SDRAM_BASE, SDRAM_SIZE, sdram_addr);
 219     /* Register peripherals */
 220     s = sh7750_init(env);
 221     irq = r2d_fpga_init(0x04000000, sh7750_irl(s));
 222     pci = sh_pci_register_bus(r2d_pci_set_irq, r2d_pci_map_irq, irq, 0, 4);
 223
 224     sm501_vga_ram_addr = qemu_ram_alloc(SM501_VRAM_SIZE);
 225     sm501_init(0x10000000, sm501_vga_ram_addr, SM501_VRAM_SIZE,
 226                serial_hds[2]);
 227
 228     /* onboard CF (True IDE mode, Master only). */
 229     mmio_ide_init(0x14001000, 0x1400080c, irq[CF_IDE], 1,
 230         drives_table[drive_get_index(IF_IDE, 0, 0)].bdrv, NULL);
 231
 232     /* NIC: rtl8139 on-board, and 2 slots. */
 233     pci_nic_init(pci, &nd_table[0], 2 << 3, "rtl8139");
 234     for (i = 1; i < nb_nics; i++)
 235         pci_nic_init(pci, &nd_table[i], -1, "ne2k_pci");
 236
 237     /* Todo: register on board registers */
 238     {
 239       int kernel_size;
 240       /* initialization which should be done by firmware */
 241       uint32_t bcr1 = 1 << 3; /* cs3 SDRAM */
 242       uint16_t bcr2 = 3 << (3 * 2); /* cs3 32-bit */
 243       cpu_physical_memory_write(SH7750_BCR1_A7, (uint8_t *)&bcr1, 4);
 244       cpu_physical_memory_write(SH7750_BCR2_A7, (uint8_t *)&bcr2, 2);
 245
 246       kernel_size = load_image(kernel_filename, phys_ram_base);
 247
 248       if (kernel_size < 0) {
 249         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
 250         exit(1);
 251       }
 252
 253       env->pc = SDRAM_BASE | 0xa0000000; /* Start from P2 area */
 254     }
 255 }
 256
 257 QEMUMachine r2d_machine = {
 258     .name = "r2d",
 259     .desc = "r2d-plus board",
 260     .init = r2d_init,
 261     .ram_require = (SDRAM_SIZE + SM501_VRAM_SIZE) | RAMSIZE_FIXED,
 262 };