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 /* CONFIG_BOOT_LINK_OFFSET of Linux kernel */
  41 #define LINUX_LOAD_OFFSET 0x800000
  42
  43 #define PA_IRLMSK       0x00
  44 #define PA_POWOFF       0x30
  45 #define PA_VERREG       0x32
  46 #define PA_OUTPORT      0x36
  47
  48 typedef struct {
  49     uint16_t bcr;
  50     uint16_t irlmsk;
  51     uint16_t irlmon;
  52     uint16_t cfctl;
  53     uint16_t cfpow;
  54     uint16_t dispctl;
  55     uint16_t sdmpow;
  56     uint16_t rtcce;
  57     uint16_t pcicd;
  58     uint16_t voyagerrts;
  59     uint16_t cfrst;
  60     uint16_t admrts;
  61     uint16_t extrst;
  62     uint16_t cfcdintclr;
  63     uint16_t keyctlclr;
  64     uint16_t pad0;
  65     uint16_t pad1;
  66     uint16_t powoff;
  67     uint16_t verreg;
  68     uint16_t inport;
  69     uint16_t outport;
  70     uint16_t bverreg;
  71
  72 /* output pin */
  73     qemu_irq irl;
  74 } r2d_fpga_t;
  75
  76 enum r2d_fpga_irq {
  77     PCI_INTD, CF_IDE, CF_CD, PCI_INTC, SM501, KEY, RTC_A, RTC_T,
  78     SDCARD, PCI_INTA, PCI_INTB, EXT, TP,
  79     NR_IRQS
  80 };
  81
  82 static const struct { short irl; uint16_t msk; } irqtab[NR_IRQS] = {
  83     [CF_IDE]    = {  1, 1<<9 },
  84     [CF_CD]     = {  2, 1<<8 },
  85     [PCI_INTA]  = {  9, 1<<14 },
  86     [PCI_INTB]  = { 10, 1<<13 },
  87     [PCI_INTC]  = {  3, 1<<12 },
  88     [PCI_INTD]  = {  0, 1<<11 },
  89     [SM501]     = {  4, 1<<10 },
  90     [KEY]       = {  5, 1<<6 },
  91     [RTC_A]     = {  6, 1<<5 },
  92     [RTC_T]     = {  7, 1<<4 },
  93     [SDCARD]    = {  8, 1<<7 },
  94     [EXT]       = { 11, 1<<0 },
  95     [TP]        = { 12, 1<<15 },
  96 };
  97
  98 static void update_irl(r2d_fpga_t *fpga)
  99 {
 100     int i, irl = 15;
 101     for (i = 0; i < NR_IRQS; i++)
 102         if (fpga->irlmon & fpga->irlmsk & irqtab[i].msk)
 103             if (irqtab[i].irl < irl)
 104                 irl = irqtab[i].irl;
 105     qemu_set_irq(fpga->irl, irl ^ 15);
 106 }
 107
 108 static void r2d_fpga_irq_set(void *opaque, int n, int level)
 109 {
 110     r2d_fpga_t *fpga = opaque;
 111     if (level)
 112         fpga->irlmon |= irqtab[n].msk;
 113     else
 114         fpga->irlmon &= ~irqtab[n].msk;
 115     update_irl(fpga);
 116 }
 117
 118 static uint32_t r2d_fpga_read(void *opaque, target_phys_addr_t addr)
 119 {
 120     r2d_fpga_t *s = opaque;
 121
 122     switch (addr) {
 123     case PA_IRLMSK:
 124         return s->irlmsk;
 125     case PA_OUTPORT:
 126         return s->outport;
 127     case PA_POWOFF:
 128         return s->powoff;
 129     case PA_VERREG:
 130         return 0x10;
 131     }
 132
 133     return 0;
 134 }
 135
 136 static void
 137 r2d_fpga_write(void *opaque, target_phys_addr_t addr, uint32_t value)
 138 {
 139     r2d_fpga_t *s = opaque;
 140
 141     switch (addr) {
 142     case PA_IRLMSK:
 143         s->irlmsk = value;
 144         update_irl(s);
 145         break;
 146     case PA_OUTPORT:
 147         s->outport = value;
 148         break;
 149     case PA_POWOFF:
 150         s->powoff = value;
 151         break;
 152     case PA_VERREG:
 153         /* Discard writes */
 154         break;
 155     }
 156 }
 157
 158 static CPUReadMemoryFunc *r2d_fpga_readfn[] = {
 159     r2d_fpga_read,
 160     r2d_fpga_read,
 161     NULL,
 162 };
 163
 164 static CPUWriteMemoryFunc *r2d_fpga_writefn[] = {
 165     r2d_fpga_write,
 166     r2d_fpga_write,
 167     NULL,
 168 };
 169
 170 static qemu_irq *r2d_fpga_init(target_phys_addr_t base, qemu_irq irl)
 171 {
 172     int iomemtype;
 173     r2d_fpga_t *s;
 174
 175     s = qemu_mallocz(sizeof(r2d_fpga_t));
 176
 177     s->irl = irl;
 178
 179     iomemtype = cpu_register_io_memory(r2d_fpga_readfn,
 180                                        r2d_fpga_writefn, s);
 181     cpu_register_physical_memory(base, 0x40, iomemtype);
 182     return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
 183 }
 184
 185 static void r2d_pci_set_irq(qemu_irq *p, int n, int l)
 186 {
 187     qemu_set_irq(p[n], l);
 188 }
 189
 190 static int r2d_pci_map_irq(PCIDevice *d, int irq_num)
 191 {
 192     const int intx[] = { PCI_INTA, PCI_INTB, PCI_INTC, PCI_INTD };
 193     return intx[d->devfn >> 3];
 194 }
 195
 196 static void r2d_init(ram_addr_t ram_size,
 197               const char *boot_device,
 198               const char *kernel_filename, const char *kernel_cmdline,
 199               const char *initrd_filename, const char *cpu_model)
 200 {
 201     CPUState *env;
 202     struct SH7750State *s;
 203     ram_addr_t sdram_addr;
 204     qemu_irq *irq;
 205     PCIBus *pci;
 206     int i;
 207
 208     if (!cpu_model)
 209         cpu_model = "SH7751R";
 210
 211     env = cpu_init(cpu_model);
 212     if (!env) {
 213         fprintf(stderr, "Unable to find CPU definition\n");
 214         exit(1);
 215     }
 216
 217     /* Allocate memory space */
 218     sdram_addr = qemu_ram_alloc(SDRAM_SIZE);
 219     cpu_register_physical_memory(SDRAM_BASE, SDRAM_SIZE, sdram_addr);
 220     /* Register peripherals */
 221     s = sh7750_init(env);
 222     irq = r2d_fpga_init(0x04000000, sh7750_irl(s));
 223     pci = sh_pci_register_bus(r2d_pci_set_irq, r2d_pci_map_irq, irq, 0, 4);
 224
 225     sm501_init(0x10000000, SM501_VRAM_SIZE, irq[SM501], serial_hds[2]);
 226
 227     /* onboard CF (True IDE mode, Master only). */
 228     if ((i = drive_get_index(IF_IDE, 0, 0)) != -1)
 229         mmio_ide_init(0x14001000, 0x1400080c, irq[CF_IDE], 1,
 230                       drives_table[i].bdrv, NULL);
 231
 232     /* NIC: rtl8139 on-board, and 2 slots. */
 233     for (i = 0; i < nb_nics; i++)
 234         pci_nic_init_nofail(&nd_table[i], "rtl8139", i==0 ? "2" : NULL);
 235
 236     /* Todo: register on board registers */
 237     if (kernel_filename) {
 238       int kernel_size;
 239       /* initialization which should be done by firmware */
 240       stl_phys(SH7750_BCR1, 1<<3); /* cs3 SDRAM */
 241       stw_phys(SH7750_BCR2, 3<<(3*2)); /* cs3 32bit */
 242
 243       if (kernel_cmdline) {
 244           kernel_size = load_image_targphys(kernel_filename,
 245                                    SDRAM_BASE + LINUX_LOAD_OFFSET,
 246                                    SDRAM_SIZE - LINUX_LOAD_OFFSET);
 247           env->pc = (SDRAM_BASE + LINUX_LOAD_OFFSET) | 0xa0000000;
 248           pstrcpy_targphys(SDRAM_BASE + 0x10100, 256, kernel_cmdline);
 249       } else {
 250           kernel_size = load_image_targphys(kernel_filename, SDRAM_BASE, SDRAM_SIZE);
 251           env->pc = SDRAM_BASE | 0xa0000000; /* Start from P2 area */
 252       }
 253
 254       if (kernel_size < 0) {
 255         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
 256         exit(1);
 257       }
 258     }
 259 }
 260
 261 static QEMUMachine r2d_machine = {
 262     .name = "r2d",
 263     .desc = "r2d-plus board",
 264     .init = r2d_init,
 265 };
 266
 267 static void r2d_machine_init(void)
 268 {
 269     qemu_register_machine(&r2d_machine);
 270 }
 271
 272 machine_init(r2d_machine_init);