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qemu-e2k/hw/sh4/r2d.c
Paolo Bonzini 1b31b677a1 hw/sh4/r2d: do not use usb_bus_find() 
usb_bus_find() is always used with argument -1; it can be replaced with
a search of the single USB bus on the machine.

Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20240223124406.234509-4-pbonzini@redhat.com>
[PMD: Fixed style]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-02-27 09:37:07 +01:00

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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 "qemu/osdep.h"
#include "qemu/units.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "cpu.h"
#include "hw/sysbus.h"
#include "hw/sh4/sh.h"
#include "sysemu/reset.h"
#include "sysemu/runstate.h"
#include "sysemu/sysemu.h"
#include "hw/boards.h"
#include "hw/pci/pci.h"
#include "hw/qdev-properties.h"
#include "net/net.h"
#include "sh7750_regs.h"
#include "hw/ide/mmio.h"
#include "hw/irq.h"
#include "hw/loader.h"
#include "hw/usb.h"
#include "hw/block/flash.h"
#define FLASH_BASE 0x00000000
#define FLASH_SIZE (16 * MiB)
#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;
MemoryRegion iomem;
} 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) &&
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 uint64_t r2d_fpga_read(void *opaque, hwaddr addr, unsigned int size)
{
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, hwaddr addr, uint64_t value, unsigned int size)
{
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(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
}
break;
case PA_VERREG:
/* Discard writes */
break;
}
}
static const MemoryRegionOps r2d_fpga_ops = {
.read = r2d_fpga_read,
.write = r2d_fpga_write,
.impl.min_access_size = 2,
.impl.max_access_size = 2,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static qemu_irq *r2d_fpga_init(MemoryRegion *sysmem,
hwaddr base, qemu_irq irl)
{
r2d_fpga_t *s;
s = g_new0(r2d_fpga_t, 1);
s->irl = irl;
memory_region_init_io(&s->iomem, NULL, &r2d_fpga_ops, s, "r2d-fpga", 0x40);
memory_region_add_subregion(sysmem, base, &s->iomem);
return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
}
typedef struct ResetData {
SuperHCPU *cpu;
uint32_t vector;
} ResetData;
static void main_cpu_reset(void *opaque)
{
ResetData *s = (ResetData *)opaque;
CPUSH4State *env = &s->cpu->env;
cpu_reset(CPU(s->cpu));
env->pc = s->vector;
}
static struct QEMU_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] QEMU_NONSTRING;
} boot_params;
static void r2d_init(MachineState *machine)
{
const char *kernel_filename = machine->kernel_filename;
const char *kernel_cmdline = machine->kernel_cmdline;
const char *initrd_filename = machine->initrd_filename;
MachineClass *mc = MACHINE_GET_CLASS(machine);
SuperHCPU *cpu;
CPUSH4State *env;
ResetData *reset_info;
struct SH7750State *s;
MemoryRegion *sdram = g_new(MemoryRegion, 1);
qemu_irq *irq;
DriveInfo *dinfo;
DeviceState *dev;
SysBusDevice *busdev;
MemoryRegion *address_space_mem = get_system_memory();
PCIBus *pci_bus;
USBBus *usb_bus;
cpu = SUPERH_CPU(cpu_create(machine->cpu_type));
env = &cpu->env;
reset_info = g_new0(ResetData, 1);
reset_info->cpu = cpu;
reset_info->vector = env->pc;
qemu_register_reset(main_cpu_reset, reset_info);
/* Allocate memory space */
memory_region_init_ram(sdram, NULL, "r2d.sdram", SDRAM_SIZE, &error_fatal);
memory_region_add_subregion(address_space_mem, SDRAM_BASE, sdram);
/* Register peripherals */
s = sh7750_init(cpu, address_space_mem);
irq = r2d_fpga_init(address_space_mem, 0x04000000, sh7750_irl(s));
dev = qdev_new("sh_pci");
busdev = SYS_BUS_DEVICE(dev);
sysbus_realize_and_unref(busdev, &error_fatal);
pci_bus = PCI_BUS(qdev_get_child_bus(dev, "pci"));
sysbus_mmio_map(busdev, 0, P4ADDR(0x1e200000));
sysbus_mmio_map(busdev, 1, A7ADDR(0x1e200000));
sysbus_connect_irq(busdev, 0, irq[PCI_INTA]);
sysbus_connect_irq(busdev, 1, irq[PCI_INTB]);
sysbus_connect_irq(busdev, 2, irq[PCI_INTC]);
sysbus_connect_irq(busdev, 3, irq[PCI_INTD]);
dev = qdev_new("sysbus-sm501");
busdev = SYS_BUS_DEVICE(dev);
qdev_prop_set_uint32(dev, "vram-size", SM501_VRAM_SIZE);
qdev_prop_set_uint64(dev, "dma-offset", 0x10000000);
qdev_prop_set_chr(dev, "chardev", serial_hd(2));
sysbus_realize_and_unref(busdev, &error_fatal);
sysbus_mmio_map(busdev, 0, 0x10000000);
sysbus_mmio_map(busdev, 1, 0x13e00000);
sysbus_connect_irq(busdev, 0, irq[SM501]);
/* onboard CF (True IDE mode, Master only). */
dinfo = drive_get(IF_IDE, 0, 0);
dev = qdev_new("mmio-ide");
busdev = SYS_BUS_DEVICE(dev);
qdev_prop_set_uint32(dev, "shift", 1);
sysbus_realize_and_unref(busdev, &error_fatal);
sysbus_connect_irq(busdev, 0, irq[CF_IDE]);
sysbus_mmio_map(busdev, 0, 0x14001000);
sysbus_mmio_map(busdev, 1, 0x1400080c);
mmio_ide_init_drives(dev, dinfo, NULL);
/*
* Onboard flash memory
* According to the old board user document in Japanese (under
* NDA) what is referred to as FROM (Area0) is connected via a
* 32-bit bus and CS0 to CN8. The docs mention a Cypress
* S29PL127J60TFI130 chipsset. Per the 'S29PL-J 002-00615
* Rev. *E' datasheet, it is a 128Mbit NOR parallel flash
* addressable in words of 16bit.
*/
dinfo = drive_get(IF_PFLASH, 0, 0);
pflash_cfi02_register(0x0, "r2d.flash", FLASH_SIZE,
dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
64 * KiB, 1, 2, 0x0001, 0x227e, 0x2220, 0x2200,
0x555, 0x2aa, 0);
/* NIC: rtl8139 on-board, and 2 slots. */
pci_init_nic_in_slot(pci_bus, mc->default_nic, NULL, "2");
pci_init_nic_devices(pci_bus, mc->default_nic);
/* USB keyboard */
usb_bus = USB_BUS(object_resolve_type_unambiguous(TYPE_USB_BUS,
&error_abort));
usb_create_simple(usb_bus, "usb-kbd");
/* 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) {
error_report("qemu: could not load kernel '%s'", kernel_filename);
exit(1);
}
/* initialization which should be done by firmware */
address_space_stl(&address_space_memory, SH7750_BCR1, 1 << 3,
MEMTXATTRS_UNSPECIFIED, NULL); /* cs3 SDRAM */
address_space_stw(&address_space_memory, SH7750_BCR2, 3 << (3 * 2),
MEMTXATTRS_UNSPECIFIED, NULL); /* cs3 32bit */
/* Start from P2 area */
reset_info->vector = (SDRAM_BASE + LINUX_LOAD_OFFSET) | 0xa0000000;
}
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) {
error_report("qemu: could not load initrd '%s'", initrd_filename);
exit(1);
}
/* initialization which should be done by firmware */
boot_params.loader_type = tswap32(1);
boot_params.initrd_start = tswap32(INITRD_LOAD_OFFSET);
boot_params.initrd_size = tswap32(initrd_size);
}
if (kernel_cmdline) {
/*
* I see no evidence that this .kernel_cmdline buffer requires
* NUL-termination, so using strncpy should be ok.
*/
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 void r2d_machine_init(MachineClass *mc)
{
mc->desc = "r2d-plus board";
mc->init = r2d_init;
mc->block_default_type = IF_IDE;
mc->default_cpu_type = TYPE_SH7751R_CPU;
mc->default_nic = "rtl8139";
}
DEFINE_MACHINE("r2d", r2d_machine_init)
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