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xemu/hw/r2d.c
Blue Swirl a303f9e37b sh4: remove dead assignments, spotted by clang analyzer 
Value stored is never read.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-04-25 20:42:43 +00:00

332 lines
8.6 KiB
C
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/*
* Renesas SH7751R R2D-PLUS emulation
*
* Copyright (c) 2007 Magnus Damm
* Copyright (c) 2008 Paul Mundt
*
* 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 "hw.h"
#include "sh.h"
#include "devices.h"
#include "sysemu.h"
#include "boards.h"
#include "pci.h"
#include "sh_pci.h"
#include "net.h"
#include "sh7750_regs.h"
#include "ide.h"
#include "loader.h"
#include "usb.h"
#include "flash.h"
#define FLASH_BASE 0x00000000
#define FLASH_SIZE 0x02000000
#define SDRAM_BASE 0x0c000000 /* Physical location of SDRAM: Area 3 */
#define SDRAM_SIZE 0x04000000
#define SM501_VRAM_SIZE 0x800000
#define BOOT_PARAMS_OFFSET 0x0010000
/* CONFIG_BOOT_LINK_OFFSET of Linux kernel */
#define LINUX_LOAD_OFFSET 0x0800000
#define INITRD_LOAD_OFFSET 0x1800000
#define PA_IRLMSK 0x00
#define PA_POWOFF 0x30
#define PA_VERREG 0x32
#define PA_OUTPORT 0x36
typedef struct {
uint16_t bcr;
uint16_t irlmsk;
uint16_t irlmon;
uint16_t cfctl;
uint16_t cfpow;
uint16_t dispctl;
uint16_t sdmpow;
uint16_t rtcce;
uint16_t pcicd;
uint16_t voyagerrts;
uint16_t cfrst;
uint16_t admrts;
uint16_t extrst;
uint16_t cfcdintclr;
uint16_t keyctlclr;
uint16_t pad0;
uint16_t pad1;
uint16_t verreg;
uint16_t inport;
uint16_t outport;
uint16_t bverreg;
/* output pin */
qemu_irq irl;
} r2d_fpga_t;
enum r2d_fpga_irq {
PCI_INTD, CF_IDE, CF_CD, PCI_INTC, SM501, KEY, RTC_A, RTC_T,
SDCARD, PCI_INTA, PCI_INTB, EXT, TP,
NR_IRQS
};
static const struct { short irl; uint16_t msk; } irqtab[NR_IRQS] = {
[CF_IDE] = { 1, 1<<9 },
[CF_CD] = { 2, 1<<8 },
[PCI_INTA] = { 9, 1<<14 },
[PCI_INTB] = { 10, 1<<13 },
[PCI_INTC] = { 3, 1<<12 },
[PCI_INTD] = { 0, 1<<11 },
[SM501] = { 4, 1<<10 },
[KEY] = { 5, 1<<6 },
[RTC_A] = { 6, 1<<5 },
[RTC_T] = { 7, 1<<4 },
[SDCARD] = { 8, 1<<7 },
[EXT] = { 11, 1<<0 },
[TP] = { 12, 1<<15 },
};
static void update_irl(r2d_fpga_t *fpga)
{
int i, irl = 15;
for (i = 0; i < NR_IRQS; i++)
if (fpga->irlmon & fpga->irlmsk & irqtab[i].msk)
if (irqtab[i].irl < irl)
irl = irqtab[i].irl;
qemu_set_irq(fpga->irl, irl ^ 15);
}
static void r2d_fpga_irq_set(void *opaque, int n, int level)
{
r2d_fpga_t *fpga = opaque;
if (level)
fpga->irlmon |= irqtab[n].msk;
else
fpga->irlmon &= ~irqtab[n].msk;
update_irl(fpga);
}
static uint32_t r2d_fpga_read(void *opaque, target_phys_addr_t addr)
{
r2d_fpga_t *s = opaque;
switch (addr) {
case PA_IRLMSK:
return s->irlmsk;
case PA_OUTPORT:
return s->outport;
case PA_POWOFF:
return 0x00;
case PA_VERREG:
return 0x10;
}
return 0;
}
static void
r2d_fpga_write(void *opaque, target_phys_addr_t addr, uint32_t value)
{
r2d_fpga_t *s = opaque;
switch (addr) {
case PA_IRLMSK:
s->irlmsk = value;
update_irl(s);
break;
case PA_OUTPORT:
s->outport = value;
break;
case PA_POWOFF:
if (value & 1) {
qemu_system_shutdown_request();
}
break;
case PA_VERREG:
/* Discard writes */
break;
}
}
static CPUReadMemoryFunc * const r2d_fpga_readfn[] = {
r2d_fpga_read,
r2d_fpga_read,
NULL,
};
static CPUWriteMemoryFunc * const r2d_fpga_writefn[] = {
r2d_fpga_write,
r2d_fpga_write,
NULL,
};
static qemu_irq *r2d_fpga_init(target_phys_addr_t base, qemu_irq irl)
{
int iomemtype;
r2d_fpga_t *s;
s = qemu_mallocz(sizeof(r2d_fpga_t));
s->irl = irl;
iomemtype = cpu_register_io_memory(r2d_fpga_readfn,
r2d_fpga_writefn, s);
cpu_register_physical_memory(base, 0x40, iomemtype);
return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
}
static void r2d_pci_set_irq(void *opaque, int n, int l)
{
qemu_irq *p = opaque;
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 struct __attribute__((__packed__))
{
int mount_root_rdonly;
int ramdisk_flags;
int orig_root_dev;
int loader_type;
int initrd_start;
int initrd_size;
char pad[232];
char kernel_cmdline[256];
} boot_params;
static void r2d_init(ram_addr_t ram_size,
const char *boot_device,
const char *kernel_filename, const char *kernel_cmdline,
const char *initrd_filename, const char *cpu_model)
{
CPUState *env;
struct SH7750State *s;
ram_addr_t sdram_addr;
qemu_irq *irq;
DriveInfo *dinfo;
int i;
if (!cpu_model)
cpu_model = "SH7751R";
env = cpu_init(cpu_model);
if (!env) {
fprintf(stderr, "Unable to find CPU definition\n");
exit(1);
}
/* Allocate memory space */
sdram_addr = qemu_ram_alloc(SDRAM_SIZE);
cpu_register_physical_memory(SDRAM_BASE, SDRAM_SIZE, sdram_addr);
/* Register peripherals */
s = sh7750_init(env);
irq = r2d_fpga_init(0x04000000, sh7750_irl(s));
sh_pci_register_bus(r2d_pci_set_irq, r2d_pci_map_irq, irq, 0, 4);
sm501_init(0x10000000, SM501_VRAM_SIZE, irq[SM501], serial_hds[2]);
/* onboard CF (True IDE mode, Master only). */
dinfo = drive_get(IF_IDE, 0, 0);
mmio_ide_init(0x14001000, 0x1400080c, irq[CF_IDE], 1,
dinfo, NULL);
/* onboard flash memory */
pflash_cfi02_register(0x0, qemu_ram_alloc(FLASH_SIZE),
dinfo ? dinfo->bdrv : NULL, (16 * 1024),
FLASH_SIZE >> 16,
1, 4, 0x0000, 0x0000, 0x0000, 0x0000,
0x555, 0x2aa, 0);
/* NIC: rtl8139 on-board, and 2 slots. */
for (i = 0; i < nb_nics; i++)
pci_nic_init_nofail(&nd_table[i], "rtl8139", i==0 ? "2" : NULL);
/* USB keyboard */
usbdevice_create("keyboard");
/* Todo: register on board registers */
memset(&boot_params, 0, sizeof(boot_params));
if (kernel_filename) {
int kernel_size;
kernel_size = load_image_targphys(kernel_filename,
SDRAM_BASE + LINUX_LOAD_OFFSET,
INITRD_LOAD_OFFSET - LINUX_LOAD_OFFSET);
if (kernel_size < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
exit(1);
}
/* initialization which should be done by firmware */
stl_phys(SH7750_BCR1, 1<<3); /* cs3 SDRAM */
stw_phys(SH7750_BCR2, 3<<(3*2)); /* cs3 32bit */
env->pc = (SDRAM_BASE + LINUX_LOAD_OFFSET) | 0xa0000000; /* Start from P2 area */
}
if (initrd_filename) {
int initrd_size;
initrd_size = load_image_targphys(initrd_filename,
SDRAM_BASE + INITRD_LOAD_OFFSET,
SDRAM_SIZE - INITRD_LOAD_OFFSET);
if (initrd_size < 0) {
fprintf(stderr, "qemu: could not load initrd '%s'\n", initrd_filename);
exit(1);
}
/* initialization which should be done by firmware */
boot_params.loader_type = 1;
boot_params.initrd_start = INITRD_LOAD_OFFSET;
boot_params.initrd_size = initrd_size;
}
if (kernel_cmdline) {
strncpy(boot_params.kernel_cmdline, kernel_cmdline,
sizeof(boot_params.kernel_cmdline));
}
rom_add_blob_fixed("boot_params", &boot_params, sizeof(boot_params),
SDRAM_BASE + BOOT_PARAMS_OFFSET);
}
static QEMUMachine r2d_machine = {
.name = "r2d",
.desc = "r2d-plus board",
.init = r2d_init,
};
static void r2d_machine_init(void)
{
qemu_register_machine(&r2d_machine);
}
machine_init(r2d_machine_init);
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