102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/*
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* Device configuration registers for PIC32.
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*
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* Copyright (C) 2012 Serge Vakulenko <serge@vak.ru>
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*
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* This file is part of the virtualmips distribution.
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* See LICENSE file for terms of the license.
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*/
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#define _GNU_SOURCE
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#include <stdlib.h>
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#include <stdio.h>
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#include <assert.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <string.h>
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#include "device.h"
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#include "mips_memory.h"
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#include "cpu.h"
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#include "pic32.h"
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#define DEVCFG_REG_SIZE 0x100
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void *dev_pic32_devcfg_access (cpu_mips_t *cpu, struct vdevice *dev,
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m_uint32_t offset, u_int op_size, u_int op_type, m_reg_t *data,
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m_uint8_t *has_set_value)
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{
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pic32_t *pic32 = dev->priv_data;
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if (offset >= DEVCFG_REG_SIZE) {
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*data = 0;
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return NULL;
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}
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if (op_type == MTS_READ)
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*data = 0;
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switch (offset & 0xfc) {
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case 0xf0: /* DEVCFG3 */
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if (op_type == MTS_READ) {
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*data = pic32->devcfg3;
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if (cpu->vm->debug_level > 2)
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printf (" read DEVCFG3 -> %08x\n", *data);
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}
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break;
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case 0xf4: /* DEVCFG2 */
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if (op_type == MTS_READ) {
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*data = pic32->devcfg2;
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if (cpu->vm->debug_level > 2)
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printf (" read DEVCFG3 -> %08x\n", *data);
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}
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break;
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case 0xf8: /* DEVCFG1 */
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if (op_type == MTS_READ) {
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*data = pic32->devcfg1;
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if (cpu->vm->debug_level > 2)
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printf (" read DEVCFG3 -> %08x\n", *data);
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}
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break;
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case 0xfc: /* DEVCFG0 */
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if (op_type == MTS_READ) {
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*data = pic32->devcfg0;
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if (cpu->vm->debug_level > 2)
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printf (" read DEVCFG3 -> %08x\n", *data);
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}
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break;
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// TODO: other registers.
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default:
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ASSERT (0, "unknown devcfg offset %x\n", offset);
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}
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*has_set_value = TRUE;
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return NULL;
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}
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void dev_pic32_devcfg_reset (cpu_mips_t *cpu, struct vdevice *dev)
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{
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pic32_t *pic32 = dev->priv_data;
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pic32->devcfg3 = 0xffff0722; // From Max32 bootloader
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pic32->devcfg2 = 0xd979f8f9;
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pic32->devcfg1 = 0x5bfd6aff;
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pic32->devcfg0 = 0xffffff7f;
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}
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int dev_pic32_devcfg_init (vm_instance_t *vm, char *name, unsigned paddr)
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{
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pic32_t *pic32 = (pic32_t *) vm->hw_data;
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pic32->cfgdev = dev_create (name);
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if (! pic32->cfgdev)
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return (-1);
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pic32->cfgdev->priv_data = pic32;
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pic32->cfgdev->phys_addr = paddr;
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pic32->cfgdev->phys_len = DEVCFG_REG_SIZE;
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pic32->cfgdev->handler = dev_pic32_devcfg_access;
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pic32->cfgdev->reset_handler = dev_pic32_devcfg_reset;
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pic32->cfgdev->flags = VDEVICE_FLAG_NO_MTS_MMAP;
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vm_bind_device (vm, pic32->cfgdev);
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return (0);
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}
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