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e4ada29e90
qemu/hw/axis_dev88.c
Avik Sil e4ada29e90 Make default boot order machine specific 
This patch makes default boot order machine specific instead of
set globally. The default boot order can be set per machine in
QEMUMachine boot_order. This also allows a machine to receive a
NULL boot order when -boot isn't used and take an appropriate action
accordingly. This helps machine boots from the devices as set in
guest's non-volatile memory location in case no boot order is
provided by the user.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-15 18:26:18 -06:00

367 lines
11 KiB
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/*
* QEMU model for the AXIS devboard 88.
*
* Copyright (c) 2009 Edgar E. Iglesias, Axis Communications AB.
*
* 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 "sysbus.h"
#include "net/net.h"
#include "flash.h"
#include "boards.h"
#include "etraxfs.h"
#include "loader.h"
#include "elf.h"
#include "cris-boot.h"
#include "sysemu/blockdev.h"
#include "exec/address-spaces.h"
#define D(x)
#define DNAND(x)
struct nand_state_t
{
DeviceState *nand;
MemoryRegion iomem;
unsigned int rdy:1;
unsigned int ale:1;
unsigned int cle:1;
unsigned int ce:1;
};
static struct nand_state_t nand_state;
static uint64_t nand_read(void *opaque, hwaddr addr, unsigned size)
{
struct nand_state_t *s = opaque;
uint32_t r;
int rdy;
r = nand_getio(s->nand);
nand_getpins(s->nand, &rdy);
s->rdy = rdy;
DNAND(printf("%s addr=%x r=%x\n", __func__, addr, r));
return r;
}
static void
nand_write(void *opaque, hwaddr addr, uint64_t value,
unsigned size)
{
struct nand_state_t *s = opaque;
int rdy;
DNAND(printf("%s addr=%x v=%x\n", __func__, addr, (unsigned)value));
nand_setpins(s->nand, s->cle, s->ale, s->ce, 1, 0);
nand_setio(s->nand, value);
nand_getpins(s->nand, &rdy);
s->rdy = rdy;
}
static const MemoryRegionOps nand_ops = {
.read = nand_read,
.write = nand_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
struct tempsensor_t
{
unsigned int shiftreg;
unsigned int count;
enum {
ST_OUT, ST_IN, ST_Z
} state;
uint16_t regs[3];
};
static void tempsensor_clkedge(struct tempsensor_t *s,
unsigned int clk, unsigned int data_in)
{
D(printf("%s clk=%d state=%d sr=%x\n", __func__,
clk, s->state, s->shiftreg));
if (s->count == 0) {
s->count = 16;
s->state = ST_OUT;
}
switch (s->state) {
case ST_OUT:
/* Output reg is clocked at negedge. */
if (!clk) {
s->count--;
s->shiftreg <<= 1;
if (s->count == 0) {
s->shiftreg = 0;
s->state = ST_IN;
s->count = 16;
}
}
break;
case ST_Z:
if (clk) {
s->count--;
if (s->count == 0) {
s->shiftreg = 0;
s->state = ST_OUT;
s->count = 16;
}
}
break;
case ST_IN:
/* Indata is sampled at posedge. */
if (clk) {
s->count--;
s->shiftreg <<= 1;
s->shiftreg |= data_in & 1;
if (s->count == 0) {
D(printf("%s cfgreg=%x\n", __func__, s->shiftreg));
s->regs[0] = s->shiftreg;
s->state = ST_OUT;
s->count = 16;
if ((s->regs[0] & 0xff) == 0) {
/* 25 degrees celcius. */
s->shiftreg = 0x0b9f;
} else if ((s->regs[0] & 0xff) == 0xff) {
/* Sensor ID, 0x8100 LM70. */
s->shiftreg = 0x8100;
} else
printf("Invalid tempsens state %x\n", s->regs[0]);
}
}
break;
}
}
#define RW_PA_DOUT 0x00
#define R_PA_DIN 0x01
#define RW_PA_OE 0x02
#define RW_PD_DOUT 0x10
#define R_PD_DIN 0x11
#define RW_PD_OE 0x12
static struct gpio_state_t
{
MemoryRegion iomem;
struct nand_state_t *nand;
struct tempsensor_t tempsensor;
uint32_t regs[0x5c / 4];
} gpio_state;
static uint64_t gpio_read(void *opaque, hwaddr addr, unsigned size)
{
struct gpio_state_t *s = opaque;
uint32_t r = 0;
addr >>= 2;
switch (addr)
{
case R_PA_DIN:
r = s->regs[RW_PA_DOUT] & s->regs[RW_PA_OE];
/* Encode pins from the nand. */
r |= s->nand->rdy << 7;
break;
case R_PD_DIN:
r = s->regs[RW_PD_DOUT] & s->regs[RW_PD_OE];
/* Encode temp sensor pins. */
r |= (!!(s->tempsensor.shiftreg & 0x10000)) << 4;
break;
default:
r = s->regs[addr];
break;
}
return r;
D(printf("%s %x=%x\n", __func__, addr, r));
}
static void gpio_write(void *opaque, hwaddr addr, uint64_t value,
unsigned size)
{
struct gpio_state_t *s = opaque;
D(printf("%s %x=%x\n", __func__, addr, (unsigned)value));
addr >>= 2;
switch (addr)
{
case RW_PA_DOUT:
/* Decode nand pins. */
s->nand->ale = !!(value & (1 << 6));
s->nand->cle = !!(value & (1 << 5));
s->nand->ce = !!(value & (1 << 4));
s->regs[addr] = value;
break;
case RW_PD_DOUT:
/* Temp sensor clk. */
if ((s->regs[addr] ^ value) & 2)
tempsensor_clkedge(&s->tempsensor, !!(value & 2),
!!(value & 16));
s->regs[addr] = value;
break;
default:
s->regs[addr] = value;
break;
}
}
static const MemoryRegionOps gpio_ops = {
.read = gpio_read,
.write = gpio_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
};
#define INTMEM_SIZE (128 * 1024)
static struct cris_load_info li;
static
void axisdev88_init(QEMUMachineInitArgs *args)
{
ram_addr_t ram_size = args->ram_size;
const char *cpu_model = args->cpu_model;
const char *kernel_filename = args->kernel_filename;
const char *kernel_cmdline = args->kernel_cmdline;
CRISCPU *cpu;
CPUCRISState *env;
DeviceState *dev;
SysBusDevice *s;
DriveInfo *nand;
qemu_irq irq[30], nmi[2], *cpu_irq;
void *etraxfs_dmac;
struct etraxfs_dma_client *dma_eth;
int i;
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
MemoryRegion *phys_intmem = g_new(MemoryRegion, 1);
/* init CPUs */
if (cpu_model == NULL) {
cpu_model = "crisv32";
}
cpu = cpu_cris_init(cpu_model);
env = &cpu->env;
/* allocate RAM */
memory_region_init_ram(phys_ram, "axisdev88.ram", ram_size);
vmstate_register_ram_global(phys_ram);
memory_region_add_subregion(address_space_mem, 0x40000000, phys_ram);
/* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the
internal memory. */
memory_region_init_ram(phys_intmem, "axisdev88.chipram", INTMEM_SIZE);
vmstate_register_ram_global(phys_intmem);
memory_region_add_subregion(address_space_mem, 0x38000000, phys_intmem);
/* Attach a NAND flash to CS1. */
nand = drive_get(IF_MTD, 0, 0);
nand_state.nand = nand_init(nand ? nand->bdrv : NULL,
NAND_MFR_STMICRO, 0x39);
memory_region_init_io(&nand_state.iomem, &nand_ops, &nand_state,
"nand", 0x05000000);
memory_region_add_subregion(address_space_mem, 0x10000000,
&nand_state.iomem);
gpio_state.nand = &nand_state;
memory_region_init_io(&gpio_state.iomem, &gpio_ops, &gpio_state,
"gpio", 0x5c);
memory_region_add_subregion(address_space_mem, 0x3001a000,
&gpio_state.iomem);
cpu_irq = cris_pic_init_cpu(env);
dev = qdev_create(NULL, "etraxfs,pic");
/* FIXME: Is there a proper way to signal vectors to the CPU core? */
qdev_prop_set_ptr(dev, "interrupt_vector", &env->interrupt_vector);
qdev_init_nofail(dev);
s = sysbus_from_qdev(dev);
sysbus_mmio_map(s, 0, 0x3001c000);
sysbus_connect_irq(s, 0, cpu_irq[0]);
sysbus_connect_irq(s, 1, cpu_irq[1]);
for (i = 0; i < 30; i++) {
irq[i] = qdev_get_gpio_in(dev, i);
}
nmi[0] = qdev_get_gpio_in(dev, 30);
nmi[1] = qdev_get_gpio_in(dev, 31);
etraxfs_dmac = etraxfs_dmac_init(0x30000000, 10);
for (i = 0; i < 10; i++) {
/* On ETRAX, odd numbered channels are inputs. */
etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1);
}
/* Add the two ethernet blocks. */
dma_eth = g_malloc0(sizeof dma_eth[0] * 4); /* Allocate 4 channels. */
etraxfs_eth_init(&nd_table[0], 0x30034000, 1, &dma_eth[0], &dma_eth[1]);
if (nb_nics > 1) {
etraxfs_eth_init(&nd_table[1], 0x30036000, 2, &dma_eth[2], &dma_eth[3]);
}
/* The DMA Connector block is missing, hardwire things for now. */
etraxfs_dmac_connect_client(etraxfs_dmac, 0, &dma_eth[0]);
etraxfs_dmac_connect_client(etraxfs_dmac, 1, &dma_eth[1]);
if (nb_nics > 1) {
etraxfs_dmac_connect_client(etraxfs_dmac, 6, &dma_eth[2]);
etraxfs_dmac_connect_client(etraxfs_dmac, 7, &dma_eth[3]);
}
/* 2 timers. */
sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL);
sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL);
for (i = 0; i < 4; i++) {
sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000,
irq[0x14 + i]);
}
if (!kernel_filename) {
fprintf(stderr, "Kernel image must be specified\n");
exit(1);
}
li.image_filename = kernel_filename;
li.cmdline = kernel_cmdline;
cris_load_image(cpu, &li);
}
static QEMUMachine axisdev88_machine = {
.name = "axis-dev88",
.desc = "AXIS devboard 88",
.init = axisdev88_init,
.is_default = 1,
DEFAULT_MACHINE_OPTIONS,
};
static void axisdev88_machine_init(void)
{
qemu_register_machine(&axisdev88_machine);
}
machine_init(axisdev88_machine_init);
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