root / hw / axis_dev88.c @ 4677d8ed
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/*
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* QEMU model for the AXIS devboard 88.
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*
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* Copyright (c) 2009 Edgar E. Iglesias, Axis Communications AB.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "sysbus.h" |
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#include "net.h" |
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#include "flash.h" |
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#include "boards.h" |
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#include "sysemu.h" |
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#include "etraxfs.h" |
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#include "loader.h" |
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#include "elf.h" |
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#define D(x)
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#define DNAND(x)
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struct nand_state_t
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{ |
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NANDFlashState *nand; |
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unsigned int rdy:1; |
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unsigned int ale:1; |
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unsigned int cle:1; |
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unsigned int ce:1; |
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}; |
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static struct nand_state_t nand_state; |
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static uint32_t nand_readl (void *opaque, target_phys_addr_t addr) |
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{ |
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struct nand_state_t *s = opaque;
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uint32_t r; |
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int rdy;
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r = nand_getio(s->nand); |
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nand_getpins(s->nand, &rdy); |
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s->rdy = rdy; |
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DNAND(printf("%s addr=%x r=%x\n", __func__, addr, r));
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return r;
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} |
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static void |
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nand_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
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{ |
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struct nand_state_t *s = opaque;
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int rdy;
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DNAND(printf("%s addr=%x v=%x\n", __func__, addr, value));
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nand_setpins(s->nand, s->cle, s->ale, s->ce, 1, 0); |
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nand_setio(s->nand, value); |
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nand_getpins(s->nand, &rdy); |
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s->rdy = rdy; |
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} |
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static CPUReadMemoryFunc * const nand_read[] = { |
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&nand_readl, |
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&nand_readl, |
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&nand_readl, |
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}; |
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static CPUWriteMemoryFunc * const nand_write[] = { |
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&nand_writel, |
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&nand_writel, |
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&nand_writel, |
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}; |
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struct tempsensor_t
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{ |
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unsigned int shiftreg; |
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unsigned int count; |
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enum {
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ST_OUT, ST_IN, ST_Z |
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} state; |
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uint16_t regs[3];
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}; |
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static void tempsensor_clkedge(struct tempsensor_t *s, |
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unsigned int clk, unsigned int data_in) |
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{ |
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D(printf("%s clk=%d state=%d sr=%x\n", __func__,
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clk, s->state, s->shiftreg)); |
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if (s->count == 0) { |
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s->count = 16;
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s->state = ST_OUT; |
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} |
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switch (s->state) {
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case ST_OUT:
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/* Output reg is clocked at negedge. */
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if (!clk) {
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s->count--; |
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s->shiftreg <<= 1;
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if (s->count == 0) { |
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s->shiftreg = 0;
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s->state = ST_IN; |
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s->count = 16;
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} |
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} |
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break;
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case ST_Z:
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if (clk) {
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s->count--; |
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if (s->count == 0) { |
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s->shiftreg = 0;
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s->state = ST_OUT; |
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s->count = 16;
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} |
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} |
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break;
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case ST_IN:
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/* Indata is sampled at posedge. */
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if (clk) {
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s->count--; |
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s->shiftreg <<= 1;
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s->shiftreg |= data_in & 1;
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if (s->count == 0) { |
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D(printf("%s cfgreg=%x\n", __func__, s->shiftreg));
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s->regs[0] = s->shiftreg;
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s->state = ST_OUT; |
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s->count = 16;
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if ((s->regs[0] & 0xff) == 0) { |
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/* 25 degrees celcius. */
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s->shiftreg = 0x0b9f;
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} else if ((s->regs[0] & 0xff) == 0xff) { |
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/* Sensor ID, 0x8100 LM70. */
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s->shiftreg = 0x8100;
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} else
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printf("Invalid tempsens state %x\n", s->regs[0]); |
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} |
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} |
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break;
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} |
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} |
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#define RW_PA_DOUT 0x00 |
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#define R_PA_DIN 0x01 |
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#define RW_PA_OE 0x02 |
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#define RW_PD_DOUT 0x10 |
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#define R_PD_DIN 0x11 |
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#define RW_PD_OE 0x12 |
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static struct gpio_state_t |
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{ |
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struct nand_state_t *nand;
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struct tempsensor_t tempsensor;
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uint32_t regs[0x5c / 4]; |
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} gpio_state; |
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static uint32_t gpio_readl (void *opaque, target_phys_addr_t addr) |
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{ |
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struct gpio_state_t *s = opaque;
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uint32_t r = 0;
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addr >>= 2;
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switch (addr)
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{ |
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case R_PA_DIN:
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r = s->regs[RW_PA_DOUT] & s->regs[RW_PA_OE]; |
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/* Encode pins from the nand. */
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r |= s->nand->rdy << 7;
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break;
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case R_PD_DIN:
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r = s->regs[RW_PD_DOUT] & s->regs[RW_PD_OE]; |
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/* Encode temp sensor pins. */
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r |= (!!(s->tempsensor.shiftreg & 0x10000)) << 4; |
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break;
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default:
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r = s->regs[addr]; |
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break;
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} |
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return r;
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D(printf("%s %x=%x\n", __func__, addr, r));
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} |
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static void gpio_writel (void *opaque, target_phys_addr_t addr, uint32_t value) |
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{ |
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struct gpio_state_t *s = opaque;
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D(printf("%s %x=%x\n", __func__, addr, value));
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addr >>= 2;
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switch (addr)
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{ |
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case RW_PA_DOUT:
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/* Decode nand pins. */
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s->nand->ale = !!(value & (1 << 6)); |
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s->nand->cle = !!(value & (1 << 5)); |
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s->nand->ce = !!(value & (1 << 4)); |
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s->regs[addr] = value; |
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break;
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case RW_PD_DOUT:
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/* Temp sensor clk. */
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if ((s->regs[addr] ^ value) & 2) |
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tempsensor_clkedge(&s->tempsensor, !!(value & 2),
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!!(value & 16));
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s->regs[addr] = value; |
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break;
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default:
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s->regs[addr] = value; |
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break;
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} |
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} |
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static CPUReadMemoryFunc * const gpio_read[] = { |
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NULL, NULL, |
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&gpio_readl, |
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}; |
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static CPUWriteMemoryFunc * const gpio_write[] = { |
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NULL, NULL, |
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&gpio_writel, |
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}; |
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#define INTMEM_SIZE (128 * 1024) |
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static uint32_t bootstrap_pc;
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static void main_cpu_reset(void *opaque) |
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{ |
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CPUState *env = opaque; |
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cpu_reset(env); |
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env->pc = bootstrap_pc; |
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} |
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static
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void axisdev88_init (ram_addr_t ram_size,
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const char *boot_device, |
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const char *kernel_filename, const char *kernel_cmdline, |
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const char *initrd_filename, const char *cpu_model) |
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{ |
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CPUState *env; |
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DeviceState *dev; |
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SysBusDevice *s; |
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qemu_irq irq[30], nmi[2], *cpu_irq; |
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void *etraxfs_dmac;
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struct etraxfs_dma_client *eth[2] = {NULL, NULL}; |
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int kernel_size;
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int i;
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int nand_regs;
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int gpio_regs;
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ram_addr_t phys_ram; |
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ram_addr_t phys_intmem; |
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/* init CPUs */
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if (cpu_model == NULL) { |
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cpu_model = "crisv32";
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} |
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env = cpu_init(cpu_model); |
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qemu_register_reset(main_cpu_reset, env); |
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/* allocate RAM */
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phys_ram = qemu_ram_alloc(ram_size); |
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cpu_register_physical_memory(0x40000000, ram_size, phys_ram | IO_MEM_RAM);
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/* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the
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internal memory. */
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phys_intmem = qemu_ram_alloc(INTMEM_SIZE); |
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cpu_register_physical_memory(0x38000000, INTMEM_SIZE,
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phys_intmem | IO_MEM_RAM); |
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/* Attach a NAND flash to CS1. */
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nand_state.nand = nand_init(NAND_MFR_STMICRO, 0x39);
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nand_regs = cpu_register_io_memory(nand_read, nand_write, &nand_state); |
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cpu_register_physical_memory(0x10000000, 0x05000000, nand_regs); |
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gpio_state.nand = &nand_state; |
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gpio_regs = cpu_register_io_memory(gpio_read, gpio_write, &gpio_state); |
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cpu_register_physical_memory(0x3001a000, 0x5c, gpio_regs); |
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cpu_irq = cris_pic_init_cpu(env); |
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dev = qdev_create(NULL, "etraxfs,pic"); |
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/* FIXME: Is there a proper way to signal vectors to the CPU core? */
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qdev_prop_set_ptr(dev, "interrupt_vector", &env->interrupt_vector);
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qdev_init_nofail(dev); |
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s = sysbus_from_qdev(dev); |
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sysbus_mmio_map(s, 0, 0x3001c000); |
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sysbus_connect_irq(s, 0, cpu_irq[0]); |
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sysbus_connect_irq(s, 1, cpu_irq[1]); |
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for (i = 0; i < 30; i++) { |
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irq[i] = qdev_get_gpio_in(dev, i); |
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} |
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nmi[0] = qdev_get_gpio_in(dev, 30); |
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nmi[1] = qdev_get_gpio_in(dev, 31); |
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etraxfs_dmac = etraxfs_dmac_init(0x30000000, 10); |
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for (i = 0; i < 10; i++) { |
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/* On ETRAX, odd numbered channels are inputs. */
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etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1); |
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} |
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/* Add the two ethernet blocks. */
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eth[0] = etraxfs_eth_init(&nd_table[0], 0x30034000, 1); |
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if (nb_nics > 1) |
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eth[1] = etraxfs_eth_init(&nd_table[1], 0x30036000, 2); |
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/* The DMA Connector block is missing, hardwire things for now. */
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etraxfs_dmac_connect_client(etraxfs_dmac, 0, eth[0]); |
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etraxfs_dmac_connect_client(etraxfs_dmac, 1, eth[0] + 1); |
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if (eth[1]) { |
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etraxfs_dmac_connect_client(etraxfs_dmac, 6, eth[1]); |
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etraxfs_dmac_connect_client(etraxfs_dmac, 7, eth[1] + 1); |
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} |
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/* 2 timers. */
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sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL); |
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sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL); |
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for (i = 0; i < 4; i++) { |
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sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000, |
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irq[0x14 + i]);
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} |
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if (kernel_filename) {
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uint64_t entry, high; |
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int kcmdline_len;
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/* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis
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devboard SDK. */
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kernel_size = load_elf(kernel_filename, -0x80000000LL,
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&entry, NULL, &high, 0, ELF_MACHINE, 0); |
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bootstrap_pc = entry; |
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if (kernel_size < 0) { |
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/* Takes a kimage from the axis devboard SDK. */
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kernel_size = load_image_targphys(kernel_filename, 0x40004000,
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ram_size); |
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bootstrap_pc = 0x40004000;
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env->regs[9] = 0x40004000 + kernel_size; |
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} |
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env->regs[8] = 0x56902387; /* RAM init magic. */ |
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if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
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if (kcmdline_len > 256) { |
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fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
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exit(1);
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} |
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/* Let the kernel know we are modifying the cmdline. */
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env->regs[10] = 0x87109563; |
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env->regs[11] = 0x40000000; |
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pstrcpy_targphys("cmdline", env->regs[11], 256, kernel_cmdline); |
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} |
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} |
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env->pc = bootstrap_pc; |
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printf ("pc =%x\n", env->pc);
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printf ("ram size =%ld\n", ram_size);
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} |
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static QEMUMachine axisdev88_machine = {
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.name = "axis-dev88",
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.desc = "AXIS devboard 88",
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.init = axisdev88_init, |
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}; |
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static void axisdev88_machine_init(void) |
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{ |
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qemu_register_machine(&axisdev88_machine); |
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} |
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machine_init(axisdev88_machine_init); |