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/*
* Copyright (C) 2010-2012 Guan Xuetao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Contributions from 2012-04-01 on are considered under GPL version 2,
* or (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "exec/gdbstub.h"
#include "exec/helper-proto.h"
#include "qemu/host-utils.h"
#ifndef CONFIG_USER_ONLY
#include "ui/console.h"
#endif
#undef DEBUG_UC32
#ifdef DEBUG_UC32
#define DPRINTF(fmt, ...) printf("%s: " fmt , __func__, ## __VA_ARGS__)
#else
#define DPRINTF(fmt, ...) do {} while (0)
#endif
#ifndef CONFIG_USER_ONLY
void helper_cp0_set(CPUUniCore32State *env, uint32_t val, uint32_t creg,
uint32_t cop)
{
UniCore32CPU *cpu = uc32_env_get_cpu(env);
/*
* movc pp.nn, rn, #imm9
* rn: UCOP_REG_D
* nn: UCOP_REG_N
* 1: sys control reg.
* 2: page table base reg.
* 3: data fault status reg.
* 4: insn fault status reg.
* 5: cache op. reg.
* 6: tlb op. reg.
* imm9: split UCOP_IMM10 with bit5 is 0
*/
switch (creg) {
case 1:
if (cop != 0) {
goto unrecognized;
}
env->cp0.c1_sys = val;
break;
case 2:
if (cop != 0) {
goto unrecognized;
}
env->cp0.c2_base = val;
break;
case 3:
if (cop != 0) {
goto unrecognized;
}
env->cp0.c3_faultstatus = val;
break;
case 4:
if (cop != 0) {
goto unrecognized;
}
env->cp0.c4_faultaddr = val;
break;
case 5:
switch (cop) {
case 28:
DPRINTF("Invalidate Entire I&D cache\n");
return;
case 20:
DPRINTF("Invalidate Entire Icache\n");
return;
case 12:
DPRINTF("Invalidate Entire Dcache\n");
return;
case 10:
DPRINTF("Clean Entire Dcache\n");
return;
case 14:
DPRINTF("Flush Entire Dcache\n");
return;
case 13:
DPRINTF("Invalidate Dcache line\n");
return;
case 11:
DPRINTF("Clean Dcache line\n");
return;
case 15:
DPRINTF("Flush Dcache line\n");
return;
}
break;
case 6:
if ((cop <= 6) && (cop >= 2)) {
/* invalid all tlb */
tlb_flush(CPU(cpu));
return;
}
break;
default:
goto unrecognized;
}
return;
unrecognized:
DPRINTF("Wrong register (%d) or wrong operation (%d) in cp0_set!\n",
creg, cop);
}
uint32_t helper_cp0_get(CPUUniCore32State *env, uint32_t creg, uint32_t cop)
{
/*
* movc rd, pp.nn, #imm9
* rd: UCOP_REG_D
* nn: UCOP_REG_N
* 0: cpuid and cachetype
* 1: sys control reg.
* 2: page table base reg.
* 3: data fault status reg.
* 4: insn fault status reg.
* imm9: split UCOP_IMM10 with bit5 is 0
*/
switch (creg) {
case 0:
switch (cop) {
case 0:
return env->cp0.c0_cpuid;
case 1:
return env->cp0.c0_cachetype;
}
break;
case 1:
if (cop == 0) {
return env->cp0.c1_sys;
}
break;
case 2:
if (cop == 0) {
return env->cp0.c2_base;
}
break;
case 3:
if (cop == 0) {
return env->cp0.c3_faultstatus;
}
break;
case 4:
if (cop == 0) {
return env->cp0.c4_faultaddr;
}
break;
}
DPRINTF("Wrong register (%d) or wrong operation (%d) in cp0_set!\n",
creg, cop);
return 0;
}
#ifdef CONFIG_CURSES
/*
* FIXME:
* 1. curses windows will be blank when switching back
* 2. backspace is not handled yet
*/
static void putc_on_screen(unsigned char ch)
{
static WINDOW *localwin;
static int init;
if (!init) {
/* Assume 80 * 30 screen to minimize the implementation */
localwin = newwin(30, 80, 0, 0);
scrollok(localwin, TRUE);
init = TRUE;
}
if (isprint(ch)) {
wprintw(localwin, "%c", ch);
} else {
switch (ch) {
case '\n':
wprintw(localwin, "%c", ch);
break;
case '\r':
/* If '\r' is put before '\n', the curses window will destroy the
* last print line. And meanwhile, '\n' implifies '\r' inside. */
break;
default: /* Not handled, so just print it hex code */
wprintw(localwin, "-- 0x%x --", ch);
}
}
wrefresh(localwin);
}
#else
#define putc_on_screen(c) do { } while (0)
#endif
void helper_cp1_putc(target_ulong x)
{
putc_on_screen((unsigned char)x); /* Output to screen */
DPRINTF("%c", x); /* Output to stdout */
}
#endif
#ifdef CONFIG_USER_ONLY
void switch_mode(CPUUniCore32State *env, int mode)
{
UniCore32CPU *cpu = uc32_env_get_cpu(env);
if (mode != ASR_MODE_USER) {
cpu_abort(CPU(cpu), "Tried to switch out of user mode\n");
}
}
void uc32_cpu_do_interrupt(CPUState *cs)
{
cpu_abort(cs, "NO interrupt in user mode\n");
}
int uc32_cpu_handle_mmu_fault(CPUState *cs, vaddr address,
int access_type, int mmu_idx)
{
cpu_abort(cs, "NO mmu fault in user mode\n");
return 1;
}
#endif
bool uc32_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
{
if (interrupt_request & CPU_INTERRUPT_HARD) {
UniCore32CPU *cpu = UNICORE32_CPU(cs);
CPUUniCore32State *env = &cpu->env;
if (!(env->uncached_asr & ASR_I)) {
cs->exception_index = UC32_EXCP_INTR;
uc32_cpu_do_interrupt(cs);
return true;
}
}
return false;
}
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