unicore32-softmmu: Add coprocessor 0(sysctrl) and 1(ocd) instruction support

Coprocessor 0 is system control coprocessor, and we need get/set its contents.
Also, all cache/tlb ops shoule be implemented here, but just ignored with no harm.

Coprocessor 1 is OCD (on-chip-debugger), which is used for faked console,
so we could output chars to this console without graphic card.
TODO: curses display should be added lator for screen output.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

1 files changed, 148 insertions, 37 deletions

diff --git a/target-unicore32/helper.c b/target-unicore32/helper.c
index 9b8ff06d5c..f9f1960817 100644
--- a/target-unicore32/helper.c
+++ b/target-unicore32/helper.c
@@ -14,6 +14,14 @@
 #include "helper.h"
 #include "host-utils.h"
 
+#undef DEBUG_UC32
+
+#ifdef DEBUG_UC32
+#define DPRINTF(fmt, ...) printf("%s: " fmt , __func__, ## __VA_ARGS__)
+#else
+#define DPRINTF(fmt, ...) do {} while (0)
+#endif
+
 CPUUniCore32State *uc32_cpu_init(const char *cpu_model)
 {
     UniCore32CPU *cpu;
@@ -45,6 +53,146 @@ uint32_t HELPER(clz)(uint32_t x)
     return clz32(x);
 }
 
+#ifndef CONFIG_USER_ONLY
+void helper_cp0_set(CPUUniCore32State *env, uint32_t val, uint32_t creg,
+        uint32_t cop)
+{
+    /*
+     * 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(env, 1);
+            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;
+}
+
+void helper_cp1_putc(target_ulong x)
+{
+    /* TODO: curses display should be added here for screen output. */
+    DPRINTF("%c", x);
+}
+#endif
+
 #ifdef CONFIG_USER_ONLY
 void switch_mode(CPUUniCore32State *env, int mode)
 {
@@ -66,43 +214,6 @@ int uc32_cpu_handle_mmu_fault(CPUUniCore32State *env, target_ulong address,
 }
 #endif
 
-/* These should probably raise undefined insn exceptions.  */
-void HELPER(set_cp)(CPUUniCore32State *env, uint32_t insn, uint32_t val)
-{
-    int op1 = (insn >> 8) & 0xf;
-    cpu_abort(env, "cp%i insn %08x\n", op1, insn);
-    return;
-}
-
-uint32_t HELPER(get_cp)(CPUUniCore32State *env, uint32_t insn)
-{
-    int op1 = (insn >> 8) & 0xf;
-    cpu_abort(env, "cp%i insn %08x\n", op1, insn);
-    return 0;
-}
-
-void HELPER(set_cp0)(CPUUniCore32State *env, uint32_t insn, uint32_t val)
-{
-    cpu_abort(env, "cp0 insn %08x\n", insn);
-}
-
-uint32_t HELPER(get_cp0)(CPUUniCore32State *env, uint32_t insn)
-{
-    cpu_abort(env, "cp0 insn %08x\n", insn);
-    return 0;
-}
-
-void HELPER(set_r29_banked)(CPUUniCore32State *env, uint32_t mode, uint32_t val)
-{
-    cpu_abort(env, "banked r29 write\n");
-}
-
-uint32_t HELPER(get_r29_banked)(CPUUniCore32State *env, uint32_t mode)
-{
-    cpu_abort(env, "banked r29 read\n");
-    return 0;
-}
-
 /* UniCore-F64 support.  We follow the convention used for F64 instrunctions:
    Single precition routines have a "s" suffix, double precision a
    "d" suffix.  */