ppc TCG target (malc)

/*

 * Tiny Code Generator for QEMU

 *

 * Copyright (c) 2008 Fabrice Bellard

 *

 * 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.

 */

#define TCG_TARGET_PPC 1

#define TCG_TARGET_REG_BITS 32

#define TCG_TARGET_WORDS_BIGENDIAN

#define TCG_TARGET_NB_REGS 32

enum {

    TCG_REG_R0 = 0,

    TCG_REG_R1,

    TCG_REG_R2,

    TCG_REG_R3,

    TCG_REG_R4,

    TCG_REG_R5,

    TCG_REG_R6,

    TCG_REG_R7,

    TCG_REG_R8,

    TCG_REG_R9,

    TCG_REG_R10,

    TCG_REG_R11,

    TCG_REG_R12,

    TCG_REG_R13,

    TCG_REG_R14,

    TCG_REG_R15,

    TCG_REG_R16,

    TCG_REG_R17,

    TCG_REG_R18,

    TCG_REG_R19,

    TCG_REG_R20,

    TCG_REG_R21,

    TCG_REG_R22,

    TCG_REG_R23,

    TCG_REG_R24,

    TCG_REG_R25,

    TCG_REG_R26,

    TCG_REG_R27,

    TCG_REG_R28,

    TCG_REG_R29,

    TCG_REG_R30,

    TCG_REG_R31

};

/* used for function call generation */

#define TCG_REG_CALL_STACK TCG_REG_R1

#define TCG_TARGET_STACK_ALIGN 16

#define TCG_TARGET_CALL_STACK_OFFSET 8

#define TCG_TARGET_CALL_ALIGN_ARGS 1

/* optional instructions */

#define TCG_TARGET_HAS_neg_i32

#define TCG_AREG0 TCG_REG_R27

#define TCG_AREG1 TCG_REG_R24

#define TCG_AREG2 TCG_REG_R25

#define TCG_AREG3 TCG_REG_R26

/* taken directly from tcg-dyngen.c */

#define MIN_CACHE_LINE_SIZE 8 /* conservative value */

static inline void flush_icache_range(unsigned long start, unsigned long stop)

{

    unsigned long p;

    start &= ~(MIN_CACHE_LINE_SIZE - 1);

    stop = (stop + MIN_CACHE_LINE_SIZE - 1) & ~(MIN_CACHE_LINE_SIZE - 1);

    for (p = start; p < stop; p += MIN_CACHE_LINE_SIZE) {

        asm volatile ("dcbst 0,%0" : : "r"(p) : "memory");

    }

    asm volatile ("sync" : : : "memory");

    for (p = start; p < stop; p += MIN_CACHE_LINE_SIZE) {

        asm volatile ("icbi 0,%0" : : "r"(p) : "memory");

    }

    asm volatile ("sync" : : : "memory");

    asm volatile ("isync" : : : "memory");

}