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atom.c

/*
 * Copyright 2008 Advanced Micro Devices, Inc.  
 *
 * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 *
 * Author: Stanislaw Skowronek
 */

#define ATOM_DEBUG

#include "atom.h"
#include "atom-names.h"
#include "atom-bits.h"

#define ATOM_COND_ABOVE       0
#define ATOM_COND_ABOVEOREQUAL      1
#define ATOM_COND_ALWAYS      2
#define ATOM_COND_BELOW       3
#define ATOM_COND_BELOWOREQUAL      4
#define ATOM_COND_EQUAL       5
#define ATOM_COND_NOTEQUAL    6

#define ATOM_PORT_ATI   0
#define ATOM_PORT_PCI   1
#define ATOM_PORT_SYSIO 2

#define ATOM_UNIT_MICROSEC    0
#define ATOM_UNIT_MILLISEC    1

#define PLL_INDEX 2
#define PLL_DATA  3

00049 typedef struct {
    struct atom_context *ctx;

    uint32_t *ps, *ws;
    int ps_shift;
    uint16_t start;
} atom_exec_context;

int atom_debug = 0;
void atom_execute_table(struct atom_context *ctx, int index, uint32_t *params);

static uint32_t atom_arg_mask[8] = {0xFFFFFFFF, 0xFFFF, 0xFFFF00, 0xFFFF0000, 0xFF, 0xFF00, 0xFF0000, 0xFF000000};
static int atom_arg_shift[8] = {0, 0, 8, 16, 0, 8, 16, 24};
static int atom_dst_to_src[8][4] = {      // translate destination alignment field to the source alignment encoding
    { 0, 0, 0, 0 },
    { 1, 2, 3, 0 },
    { 1, 2, 3, 0 },
    { 1, 2, 3, 0 },
    { 4, 5, 6, 7 },
    { 4, 5, 6, 7 },
    { 4, 5, 6, 7 },
    { 4, 5, 6, 7 },
};
static int atom_def_dst[8] = { 0, 0, 1, 2, 0, 1, 2, 3 };

static int debug_depth = 0;
#ifdef ATOM_DEBUG
static void debug_print_spaces(int n)
{
    while(n--)
      printk("   ");
}
#define DEBUG(...) do if(atom_debug) { printk(KERN_DEBUG __VA_ARGS__); } while(0)
#define SDEBUG(...) do if(atom_debug) { printk(KERN_DEBUG); debug_print_spaces(debug_depth); printk(__VA_ARGS__); } while(0)
#else
#define DEBUG(...) do { } while(0)
#define SDEBUG(...) do { } while(0)
#endif

static uint32_t atom_iio_execute(struct atom_context *ctx, int base, uint32_t index, uint32_t data)
{
    uint32_t temp = 0xCDCDCDCD;
    while(1)
      switch(CU8(base)) {
      case ATOM_IIO_NOP:
          base++;
          break;
      case ATOM_IIO_READ:
          temp = ctx->card->reg_read(ctx->card, CU16(base+1));
          base+=3;
          break;
      case ATOM_IIO_WRITE:
          ctx->card->reg_write(ctx->card, CU16(base+1), temp);
          base+=3;
          break;
      case ATOM_IIO_CLEAR:
          temp &= ~((0xFFFFFFFF >> (32-CU8(base+1))) << CU8(base+2));
          base+=3;
          break;
      case ATOM_IIO_SET:
          temp |= (0xFFFFFFFF >> (32-CU8(base+1))) << CU8(base+2);
          base+=3;
          break;
      case ATOM_IIO_MOVE_INDEX:
          temp &= ~((0xFFFFFFFF >> (32-CU8(base+1))) << CU8(base+2));
          temp |= ((index >> CU8(base+2)) & (0xFFFFFFFF >> (32-CU8(base+1)))) << CU8(base+3);
          base+=4;
          break;
      case ATOM_IIO_MOVE_DATA:
          temp &= ~((0xFFFFFFFF >> (32-CU8(base+1))) << CU8(base+2));
          temp |= ((data >> CU8(base+2)) & (0xFFFFFFFF >> (32-CU8(base+1)))) << CU8(base+3);
          base+=4;
          break;
      case ATOM_IIO_MOVE_ATTR:
          temp &= ~((0xFFFFFFFF >> (32-CU8(base+1))) << CU8(base+2));
          temp |= ((ctx->io_attr >> CU8(base+2)) & (0xFFFFFFFF >> (32-CU8(base+1)))) << CU8(base+3);
          base+=4;
          break;
      case ATOM_IIO_END:
          return temp;
      default:
          printk(KERN_INFO "Unknown IIO opcode.\n");
          return 0;
      }
}

static uint32_t atom_get_src_int(atom_exec_context *ctx, uint8_t attr, int *ptr, uint32_t *saved, int print)
{
    uint32_t idx, val = 0xCDCDCDCD, align, arg;
    struct atom_context *gctx = ctx->ctx;
    arg = attr & 7;
    align = (attr >> 3) & 7;
    switch(arg) {
    case ATOM_ARG_REG:
      idx = U16(*ptr);
      (*ptr)+=2;
      if(print)
          DEBUG("REG[0x%04X]", idx);
      idx += gctx->reg_block;
      switch(gctx->io_mode) {
      case ATOM_IO_MM:
          val = gctx->card->reg_read(gctx->card, idx);
          break;
      case ATOM_IO_PCI:
          printk(KERN_INFO "PCI registers are not implemented.\n");
          return 0;
      case ATOM_IO_SYSIO:
          printk(KERN_INFO "SYSIO registers are not implemented.\n");
          return 0;
      default:
          if(!(gctx->io_mode&0x80)) {
            printk(KERN_INFO "Bad IO mode.\n");
            return 0;
          }
          if(!gctx->iio[gctx->io_mode&0x7F]) {
            printk(KERN_INFO "Undefined indirect IO read method %d.\n", gctx->io_mode&0x7F);
            return 0;
          }
          val = atom_iio_execute(gctx, gctx->iio[gctx->io_mode&0x7F], idx, 0);
      }
      break;
    case ATOM_ARG_PS:
      idx = U8(*ptr);
      (*ptr)++;
      val = ctx->ps[idx];
      if(print)
          DEBUG("PS[0x%02X,0x%04X]", idx, val);
      break;
    case ATOM_ARG_WS:
      idx = U8(*ptr);
      (*ptr)++;
      if(print)
          DEBUG("WS[0x%02X]", idx);
      switch(idx) {
      case ATOM_WS_QUOTIENT:
          val = gctx->divmul[0];
          break;
      case ATOM_WS_REMAINDER:
          val = gctx->divmul[1];
          break;
      case ATOM_WS_DATAPTR:
          val = gctx->data_block;
          break;
      case ATOM_WS_SHIFT:
          val = gctx->shift;
          break;
      case ATOM_WS_OR_MASK:
          val = 1<<gctx->shift;
          break;
      case ATOM_WS_AND_MASK:
          val = ~(1<<gctx->shift);
          break;
      case ATOM_WS_FB_WINDOW:
          val = gctx->fb_base;
          break;
      case ATOM_WS_ATTRIBUTES:
          val = gctx->io_attr;
          break;
      default:
          val = ctx->ws[idx];
      }
      break;
    case ATOM_ARG_ID:
      idx = U16(*ptr);
      (*ptr)+=2;
      if(print) {
          if(gctx->data_block)
            DEBUG("ID[0x%04X+%04X]", idx, gctx->data_block);
          else
            DEBUG("ID[0x%04X]", idx);
      }
      val = U32(idx + gctx->data_block);
      break;
    case ATOM_ARG_FB:
      idx = U8(*ptr);
      (*ptr)++;
      if(print)
          DEBUG("FB[0x%02X]", idx);
      val = *(uint32_t*)(gctx->atom_fb_scratch + gctx->fb_base + idx);
      //    printk(KERN_INFO "FB access is not implemented.\n");
      return val;
    case ATOM_ARG_IMM:
      switch(align) {
      case ATOM_SRC_DWORD:
          val = U32(*ptr);
          (*ptr)+=4;
          if(print)
            DEBUG("IMM 0x%08X\n", val);
          return val;
      case ATOM_SRC_WORD0:
      case ATOM_SRC_WORD8:
      case ATOM_SRC_WORD16:
          val = U16(*ptr);
          (*ptr)+=2;
          if(print)
            DEBUG("IMM 0x%04X\n", val);
          return val;
      case ATOM_SRC_BYTE0:
      case ATOM_SRC_BYTE8:
      case ATOM_SRC_BYTE16:
      case ATOM_SRC_BYTE24:
          val = U8(*ptr);
          (*ptr)++;
          if(print)
            DEBUG("IMM 0x%02X\n", val);
          return val;
      }
      return 0;
    case ATOM_ARG_PLL:
      idx = U8(*ptr);
      (*ptr)++;
      if(print)
          DEBUG("PLL[0x%02X]", idx);
      gctx->card->reg_write(gctx->card, PLL_INDEX, idx);
      val = gctx->card->reg_read(gctx->card, PLL_DATA);
      break;
    case ATOM_ARG_MC:
      idx = U8(*ptr);
      (*ptr)++;
      if(print)
          DEBUG("MC[0x%02X]", idx);
      val = gctx->card->mc_read(gctx->card, idx);
      return 0;
    }
    if(saved)
      *saved = val;
    val &= atom_arg_mask[align];
    val >>= atom_arg_shift[align];
    if(print)
      switch(align) {
      case ATOM_SRC_DWORD:
          DEBUG(".[31:0] -> 0x%08X\n", val);
          break;
      case ATOM_SRC_WORD0:
          DEBUG(".[15:0] -> 0x%04X\n", val);
          break;
      case ATOM_SRC_WORD8:
          DEBUG(".[23:8] -> 0x%04X\n", val);
          break;
      case ATOM_SRC_WORD16:
          DEBUG(".[31:16] -> 0x%04X\n", val);
          break;
      case ATOM_SRC_BYTE0:
          DEBUG(".[7:0] -> 0x%02X\n", val);
          break;
      case ATOM_SRC_BYTE8:
          DEBUG(".[15:8] -> 0x%02X\n", val);
          break;
      case ATOM_SRC_BYTE16:
          DEBUG(".[23:16] -> 0x%02X\n", val);
          break;
      case ATOM_SRC_BYTE24:
          DEBUG(".[31:24] -> 0x%02X\n", val);
          break;
      }
    return val;
}

static void atom_skip_src_int(atom_exec_context *ctx, uint8_t attr, int *ptr)
{
    uint32_t align = (attr >> 3) & 7, arg = attr & 7;
    switch(arg) {
    case ATOM_ARG_REG:
    case ATOM_ARG_ID:
      (*ptr)+=2;
      break;
    case ATOM_ARG_PLL:
    case ATOM_ARG_MC:
    case ATOM_ARG_PS:
    case ATOM_ARG_WS:
    case ATOM_ARG_FB:
      (*ptr)++;
      break;
    case ATOM_ARG_IMM:
      switch(align) {
      case ATOM_SRC_DWORD:
          (*ptr)+=4;
          return;
      case ATOM_SRC_WORD0:
      case ATOM_SRC_WORD8:
      case ATOM_SRC_WORD16:
          (*ptr)+=2;
          return;
      case ATOM_SRC_BYTE0:
      case ATOM_SRC_BYTE8:
      case ATOM_SRC_BYTE16:
      case ATOM_SRC_BYTE24:
          (*ptr)++;
          return;
      }
      return;
    }
}

static uint32_t atom_get_src(atom_exec_context *ctx, uint8_t attr, int *ptr)
{
    return atom_get_src_int(ctx, attr, ptr, NULL, 1);
}

static uint32_t atom_get_dst(atom_exec_context *ctx, int arg, uint8_t attr, int *ptr, uint32_t *saved, int print)
{
    return atom_get_src_int(ctx, arg|atom_dst_to_src[(attr>>3)&7][(attr>>6)&3]<<3, ptr, saved, print);
}

static void atom_skip_dst(atom_exec_context *ctx, int arg, uint8_t attr, int *ptr)
{
    atom_skip_src_int(ctx, arg|atom_dst_to_src[(attr>>3)&7][(attr>>6)&3]<<3, ptr);
}

static void atom_put_dst(atom_exec_context *ctx, int arg, uint8_t attr, int *ptr, uint32_t val, uint32_t saved)
{
    uint32_t align = atom_dst_to_src[(attr>>3)&7][(attr>>6)&3], old_val = val, idx;
    struct atom_context *gctx = ctx->ctx;
    old_val &= atom_arg_mask[align] >> atom_arg_shift[align];
    val <<= atom_arg_shift[align];
    val &= atom_arg_mask[align];
    saved &= ~atom_arg_mask[align];
    val |= saved;
    switch(arg) {
    case ATOM_ARG_REG:
      idx = U16(*ptr);
      (*ptr)+=2;
      DEBUG("REG[0x%04X]", idx);
      idx += gctx->reg_block;
      switch(gctx->io_mode) {
      case ATOM_IO_MM:
          if(idx == 0)
            gctx->card->reg_write(gctx->card, idx, val<<2);
          else
            gctx->card->reg_write(gctx->card, idx, val);
          break;
      case ATOM_IO_PCI:
          printk(KERN_INFO "PCI registers are not implemented.\n");
          return;
      case ATOM_IO_SYSIO:
          printk(KERN_INFO "SYSIO registers are not implemented.\n");
          return;
      default:
          if(!(gctx->io_mode&0x80)) {
            printk(KERN_INFO "Bad IO mode.\n");
            return;
          }
          if(!gctx->iio[gctx->io_mode&0xFF]) {
            printk(KERN_INFO "Undefined indirect IO write method %d.\n", gctx->io_mode&0x7F);
            return;
          }
          atom_iio_execute(gctx, gctx->iio[gctx->io_mode&0xFF], idx, val);
      }
      break;
    case ATOM_ARG_PS:
      idx = U8(*ptr);
      (*ptr)++;
      DEBUG("PS[0x%02X]", idx);
      ctx->ps[idx] = val;
      break;
    case ATOM_ARG_WS:
      idx = U8(*ptr);
      (*ptr)++;
      DEBUG("WS[0x%02X]", idx);
      switch(idx) {
      case ATOM_WS_QUOTIENT:
          gctx->divmul[0] = val;
          break;
      case ATOM_WS_REMAINDER:
          gctx->divmul[1] = val;
          break;
      case ATOM_WS_DATAPTR:
          gctx->data_block = val;
          break;
      case ATOM_WS_SHIFT:
          gctx->shift = val;
          break;
      case ATOM_WS_OR_MASK:
      case ATOM_WS_AND_MASK:
          break;
      case ATOM_WS_FB_WINDOW:
          gctx->fb_base = val;
          break;
      case ATOM_WS_ATTRIBUTES:
          gctx->io_attr = val;
          break;
      default:
          ctx->ws[idx] = val;
      }
      break;
    case ATOM_ARG_FB:
      idx = U8(*ptr);
      (*ptr)++;
      DEBUG("FB[0x%02X]", idx);
      *(uint32_t *)(gctx->atom_fb_scratch + gctx->fb_base + idx) = val;
      //    printk(KERN_INFO "FB access is not implemented.\n");
      return;
    case ATOM_ARG_PLL:
      idx = U8(*ptr);
      (*ptr)++;
      DEBUG("PLL[0x%02X]", idx);
      gctx->card->reg_write(gctx->card, PLL_INDEX, idx);
      gctx->card->reg_write(gctx->card, PLL_DATA, val);
      break;
    case ATOM_ARG_MC:
      idx = U8(*ptr);
      (*ptr)++;
      DEBUG("MC[0x%02X]", idx);
      gctx->card->mc_write(gctx->card, idx, val);
      return;
    }
    switch(align) {
    case ATOM_SRC_DWORD:
      DEBUG(".[31:0] <- 0x%08X\n", old_val);
      break;
    case ATOM_SRC_WORD0:
      DEBUG(".[15:0] <- 0x%04X\n", old_val);
      break;
    case ATOM_SRC_WORD8:
      DEBUG(".[23:8] <- 0x%04X\n", old_val);
      break;
    case ATOM_SRC_WORD16:
      DEBUG(".[31:16] <- 0x%04X\n", old_val);
      break;
    case ATOM_SRC_BYTE0:
      DEBUG(".[7:0] <- 0x%02X\n", old_val);
      break;
    case ATOM_SRC_BYTE8:
      DEBUG(".[15:8] <- 0x%02X\n", old_val);
      break;
    case ATOM_SRC_BYTE16:
      DEBUG(".[23:16] <- 0x%02X\n", old_val);
      break;
    case ATOM_SRC_BYTE24:
      DEBUG(".[31:24] <- 0x%02X\n", old_val);
      break;
    }
}

static void atom_op_add(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t dst, src, saved;
    int dptr = *ptr;
    SDEBUG("   dst: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1);
    SDEBUG("   src: ");
    src = atom_get_src(ctx, attr, ptr);
    dst += src;
    SDEBUG("   dst: ");
    atom_put_dst(ctx, arg, attr, &dptr, dst, saved);
}

static void atom_op_and(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t dst, src, saved;
    int dptr = *ptr;
    SDEBUG("   dst: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1);
    SDEBUG("   src: ");
    src = atom_get_src(ctx, attr, ptr);
    dst &= src;
    SDEBUG("   dst: ");
    atom_put_dst(ctx, arg, attr, &dptr, dst, saved);
}

static void atom_op_beep(atom_exec_context *ctx, int *ptr, int arg)
{
    printk("ATOM BIOS beeped!\n");
}

static void atom_op_calltable(atom_exec_context *ctx, int *ptr, int arg)
{
    int idx = U8((*ptr)++);
    if(idx < ATOM_TABLE_NAMES_CNT)
      SDEBUG("   table: %d (%s)\n", idx, atom_table_names[idx]);
    else
      SDEBUG("   table: %d\n", idx);
    if(U16(ctx->ctx->cmd_table + 4 + 2*idx))
      atom_execute_table(ctx->ctx, idx, ctx->ps+ctx->ps_shift);
}

static void atom_op_clear(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t saved;
    int dptr = *ptr;
    attr &= 0x38;
    attr |= atom_def_dst[attr>>3]<<6;
    atom_get_dst(ctx, arg, attr, ptr, &saved, 0);
    SDEBUG("   dst: ");
    atom_put_dst(ctx, arg, attr, &dptr, 0, saved);
}

static void atom_op_compare(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t dst, src;
    SDEBUG("   src1: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, NULL, 1);
    SDEBUG("   src2: ");
    src = atom_get_src(ctx, attr, ptr);
    ctx->ctx->cs_equal = (dst == src);
    ctx->ctx->cs_above = (dst > src);
    SDEBUG("   result: %s %s\n", ctx->ctx->cs_equal?"EQ":"NE", ctx->ctx->cs_above?"GT":"LE");
}

static void atom_op_delay(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t count = U8((*ptr)++);
    SDEBUG("   count: %d\n", count);
#ifdef __KERNEL
    if(arg == ATOM_UNIT_MICROSEC)
      schedule_timeout_uninterruptible(usecs_to_jiffies(count));
    else
      schedule_timeout_uninterruptible(msecs_to_jiffies(count));
#else
    if(arg == ATOM_UNIT_MICROSEC)
      usleep(count);
    else
      usleep(count);
#endif
}

static void atom_op_div(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t dst, src;
    SDEBUG("   src1: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, NULL, 1);
    SDEBUG("   src2: ");
    src = atom_get_src(ctx, attr, ptr);
    if(src != 0) {
      ctx->ctx->divmul[0] = dst/src;
      ctx->ctx->divmul[1] = dst%src;
    } else {
      ctx->ctx->divmul[0] = 0;
      ctx->ctx->divmul[1] = 0;
    }
}

static void atom_op_eot(atom_exec_context *ctx, int *ptr, int arg)
{
    /* functionally, a nop */
}

static void atom_op_jump(atom_exec_context *ctx, int *ptr, int arg)
{
    int execute = 0, target = U16(*ptr);
    (*ptr)+=2;
    switch(arg) {
    case ATOM_COND_ABOVE:
      execute = ctx->ctx->cs_above;
      break;
    case ATOM_COND_ABOVEOREQUAL:
      execute = ctx->ctx->cs_above || ctx->ctx->cs_equal;
      break;
    case ATOM_COND_ALWAYS:
      execute = 1;
      break;
    case ATOM_COND_BELOW:
      execute = !(ctx->ctx->cs_above || ctx->ctx->cs_equal);
      break;
    case ATOM_COND_BELOWOREQUAL:
      execute = !ctx->ctx->cs_above;
      break;
    case ATOM_COND_EQUAL:
      execute = ctx->ctx->cs_equal;
      break;
    case ATOM_COND_NOTEQUAL:
      execute = !ctx->ctx->cs_equal;
      break;
    }
    if(arg != ATOM_COND_ALWAYS)
      SDEBUG("   taken: %s\n", execute?"yes":"no");
    SDEBUG("   target: 0x%04X\n", target);
    if(execute)
      *ptr = ctx->start+target;
}

static void atom_op_mask(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t dst, src1, src2, saved;
    int dptr = *ptr;
    SDEBUG("   dst: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1);
    SDEBUG("   src1: ");
    src1 = atom_get_src(ctx, attr, ptr);
    SDEBUG("   src2: ");
    src2 = atom_get_src(ctx, attr, ptr);
    dst &= src1;
    dst |= src2;
    SDEBUG("   dst: ");
    atom_put_dst(ctx, arg, attr, &dptr, dst, saved);
}

static void atom_op_move(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t src, saved;
    int dptr = *ptr;
    if(((attr>>3)&7) != ATOM_SRC_DWORD)
      atom_get_dst(ctx, arg, attr, ptr, &saved, 0);
    else {
      atom_skip_dst(ctx, arg, attr, ptr);
      saved = 0xCDCDCDCD;
    }
    SDEBUG("   src: ");
    src = atom_get_src(ctx, attr, ptr);
    SDEBUG("   dst: ");
    atom_put_dst(ctx, arg, attr, &dptr, src, saved);
}

static void atom_op_mul(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t dst, src;
    SDEBUG("   src1: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, NULL, 1);
    SDEBUG("   src2: ");
    src = atom_get_src(ctx, attr, ptr);
    ctx->ctx->divmul[0] = dst*src;
}

static void atom_op_nop(atom_exec_context *ctx, int *ptr, int arg)
{
    /* nothing */
}

static void atom_op_or(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t dst, src, saved;
    int dptr = *ptr;
    SDEBUG("   dst: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1);
    SDEBUG("   src: ");
    src = atom_get_src(ctx, attr, ptr);
    dst |= src;
    SDEBUG("   dst: ");
    atom_put_dst(ctx, arg, attr, &dptr, dst, saved);
}

static void atom_op_postcard(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t val = U8((*ptr)++);
    SDEBUG("POST card output: 0x%02X\n", val);
}

static void atom_op_repeat(atom_exec_context *ctx, int *ptr, int arg)
{
    printk(KERN_INFO "unimplemented!\n");
}

static void atom_op_restorereg(atom_exec_context *ctx, int *ptr, int arg)
{
    printk(KERN_INFO "unimplemented!\n");
}

static void atom_op_savereg(atom_exec_context *ctx, int *ptr, int arg)
{
    printk(KERN_INFO "unimplemented!\n");
}

static void atom_op_setdatablock(atom_exec_context *ctx, int *ptr, int arg)
{
    int idx = U8(*ptr);
    (*ptr)++;
    SDEBUG("   block: %d\n", idx);
    if(!idx)
      ctx->ctx->data_block = 0;
    else if(idx==255)
      ctx->ctx->data_block = ctx->start;
    else
      ctx->ctx->data_block = U16(ctx->ctx->data_table + 4 + 2*idx);
    SDEBUG("   base: 0x%04X\n", ctx->ctx->data_block);
}

static void atom_op_setfbbase(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    SDEBUG("   fb_base: ");
    ctx->ctx->fb_base = atom_get_src(ctx, attr, ptr);
}

static void atom_op_setport(atom_exec_context *ctx, int *ptr, int arg)
{
    int port;
    switch(arg) {
    case ATOM_PORT_ATI:
      port = U16(*ptr);
      if(port < ATOM_IO_NAMES_CNT)
            SDEBUG("   port: %d (%s)\n", port, atom_io_names[port]);
      else
            SDEBUG("   port: %d\n", port);
      if(!port)
          ctx->ctx->io_mode = ATOM_IO_MM;
      else
          ctx->ctx->io_mode = ATOM_IO_IIO|port;
      (*ptr)+=2;
      break;
    case ATOM_PORT_PCI:
      ctx->ctx->io_mode = ATOM_IO_PCI;
      (*ptr)++;
      break;
    case ATOM_PORT_SYSIO:
      ctx->ctx->io_mode = ATOM_IO_SYSIO;
      (*ptr)++;
      break;
    }
}

static void atom_op_setregblock(atom_exec_context *ctx, int *ptr, int arg)
{
    ctx->ctx->reg_block = U16(*ptr);
    (*ptr)+=2;
    SDEBUG("   base: 0x%04X\n", ctx->ctx->reg_block);
}

static void atom_op_shl(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++), shift;
    uint32_t saved, dst;
    int dptr = *ptr;
    attr &= 0x38;
    attr |= atom_def_dst[attr>>3]<<6;
    SDEBUG("   dst: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1);
    shift = U8((*ptr)++);
    SDEBUG("   shift: %d\n", shift);
    dst <<= shift;
    SDEBUG("   dst: ");
    atom_put_dst(ctx, arg, attr, &dptr, dst, saved);
}

static void atom_op_shr(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++), shift;
    uint32_t saved, dst;
    int dptr = *ptr;
    attr &= 0x38;
    attr |= atom_def_dst[attr>>3]<<6;
    SDEBUG("   dst: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1);
    shift = U8((*ptr)++);
    SDEBUG("   shift: %d\n", shift);
    dst >>= shift;
    SDEBUG("   dst: ");
    atom_put_dst(ctx, arg, attr, &dptr, dst, saved);
}

static void atom_op_sub(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t dst, src, saved;
    int dptr = *ptr;
    SDEBUG("   dst: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1);
    SDEBUG("   src: ");
    src = atom_get_src(ctx, attr, ptr);
    dst -= src;
    SDEBUG("   dst: ");
    atom_put_dst(ctx, arg, attr, &dptr, dst, saved);
}

static void atom_op_switch(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t src, val, target;
    SDEBUG("   switch: ");
    src = atom_get_src(ctx, attr, ptr);
    while(U16(*ptr) != ATOM_CASE_END)
      if(U8(*ptr) == ATOM_CASE_MAGIC) {
          (*ptr)++;
          SDEBUG("   case: ");
          val = atom_get_src(ctx, (attr&0x38)|ATOM_ARG_IMM, ptr);
          target = U16(*ptr);
          if(val == src) {
            SDEBUG("   target: %04X\n", target);
            *ptr = ctx->start+target;
            return;
          }
          (*ptr) += 2;
      } else {
          printk(KERN_INFO "Bad case.\n");
          return;
      }
    (*ptr) += 2;
}

static void atom_op_test(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t dst, src;
    SDEBUG("   src1: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, NULL, 1);
    SDEBUG("   src2: ");
    src = atom_get_src(ctx, attr, ptr);
    ctx->ctx->cs_equal = ((dst & src) == 0);
    SDEBUG("   result: %s\n", ctx->ctx->cs_equal?"EQ":"NE");
}

static void atom_op_xor(atom_exec_context *ctx, int *ptr, int arg)
{
    uint8_t attr = U8((*ptr)++);
    uint32_t dst, src, saved;
    int dptr = *ptr;
    SDEBUG("   dst: ");
    dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1);
    SDEBUG("   src: ");
    src = atom_get_src(ctx, attr, ptr);
    dst ^= src;
    SDEBUG("   dst: ");
    atom_put_dst(ctx, arg, attr, &dptr, dst, saved);
}

static void atom_op_debug(atom_exec_context *ctx, int *ptr, int arg)
{
    printk(KERN_INFO "unimplemented!\n");
}

static struct {
    void (*func)(atom_exec_context *, int *, int);
    int arg;
} opcode_table[ATOM_OP_CNT] = {
    { NULL, 0 },
    { atom_op_move, ATOM_ARG_REG },
    { atom_op_move, ATOM_ARG_PS },
    { atom_op_move, ATOM_ARG_WS },
    { atom_op_move, ATOM_ARG_FB },
    { atom_op_move, ATOM_ARG_PLL },
    { atom_op_move, ATOM_ARG_MC },
    { atom_op_and, ATOM_ARG_REG },
    { atom_op_and, ATOM_ARG_PS },
    { atom_op_and, ATOM_ARG_WS },
    { atom_op_and, ATOM_ARG_FB },
    { atom_op_and, ATOM_ARG_PLL },
    { atom_op_and, ATOM_ARG_MC },
    { atom_op_or, ATOM_ARG_REG },
    { atom_op_or, ATOM_ARG_PS },
    { atom_op_or, ATOM_ARG_WS },
    { atom_op_or, ATOM_ARG_FB },
    { atom_op_or, ATOM_ARG_PLL },
    { atom_op_or, ATOM_ARG_MC },
    { atom_op_shl, ATOM_ARG_REG },
    { atom_op_shl, ATOM_ARG_PS },
    { atom_op_shl, ATOM_ARG_WS },
    { atom_op_shl, ATOM_ARG_FB },
    { atom_op_shl, ATOM_ARG_PLL },
    { atom_op_shl, ATOM_ARG_MC },
    { atom_op_shr, ATOM_ARG_REG },
    { atom_op_shr, ATOM_ARG_PS },
    { atom_op_shr, ATOM_ARG_WS },
    { atom_op_shr, ATOM_ARG_FB },
    { atom_op_shr, ATOM_ARG_PLL },
    { atom_op_shr, ATOM_ARG_MC },
    { atom_op_mul, ATOM_ARG_REG },
    { atom_op_mul, ATOM_ARG_PS },
    { atom_op_mul, ATOM_ARG_WS },
    { atom_op_mul, ATOM_ARG_FB },
    { atom_op_mul, ATOM_ARG_PLL },
    { atom_op_mul, ATOM_ARG_MC },
    { atom_op_div, ATOM_ARG_REG },
    { atom_op_div, ATOM_ARG_PS },
    { atom_op_div, ATOM_ARG_WS },
    { atom_op_div, ATOM_ARG_FB },
    { atom_op_div, ATOM_ARG_PLL },
    { atom_op_div, ATOM_ARG_MC },
    { atom_op_add, ATOM_ARG_REG },
    { atom_op_add, ATOM_ARG_PS },
    { atom_op_add, ATOM_ARG_WS },
    { atom_op_add, ATOM_ARG_FB },
    { atom_op_add, ATOM_ARG_PLL },
    { atom_op_add, ATOM_ARG_MC },
    { atom_op_sub, ATOM_ARG_REG },
    { atom_op_sub, ATOM_ARG_PS },
    { atom_op_sub, ATOM_ARG_WS },
    { atom_op_sub, ATOM_ARG_FB },
    { atom_op_sub, ATOM_ARG_PLL },
    { atom_op_sub, ATOM_ARG_MC },
    { atom_op_setport, ATOM_PORT_ATI },
    { atom_op_setport, ATOM_PORT_PCI },
    { atom_op_setport, ATOM_PORT_SYSIO },
    { atom_op_setregblock, 0 },
    { atom_op_setfbbase, 0 },
    { atom_op_compare, ATOM_ARG_REG },
    { atom_op_compare, ATOM_ARG_PS },
    { atom_op_compare, ATOM_ARG_WS },
    { atom_op_compare, ATOM_ARG_FB },
    { atom_op_compare, ATOM_ARG_PLL },
    { atom_op_compare, ATOM_ARG_MC },
    { atom_op_switch, 0 },
    { atom_op_jump, ATOM_COND_ALWAYS },
    { atom_op_jump, ATOM_COND_EQUAL },
    { atom_op_jump, ATOM_COND_BELOW },
    { atom_op_jump, ATOM_COND_ABOVE },
    { atom_op_jump, ATOM_COND_BELOWOREQUAL },
    { atom_op_jump, ATOM_COND_ABOVEOREQUAL },
    { atom_op_jump, ATOM_COND_NOTEQUAL },
    { atom_op_test, ATOM_ARG_REG },
    { atom_op_test, ATOM_ARG_PS },
    { atom_op_test, ATOM_ARG_WS },
    { atom_op_test, ATOM_ARG_FB },
    { atom_op_test, ATOM_ARG_PLL },
    { atom_op_test, ATOM_ARG_MC },
    { atom_op_delay, ATOM_UNIT_MILLISEC },
    { atom_op_delay, ATOM_UNIT_MICROSEC },
    { atom_op_calltable, 0 },
    { atom_op_repeat, 0 },
    { atom_op_clear, ATOM_ARG_REG },
    { atom_op_clear, ATOM_ARG_PS },
    { atom_op_clear, ATOM_ARG_WS },
    { atom_op_clear, ATOM_ARG_FB },
    { atom_op_clear, ATOM_ARG_PLL },
    { atom_op_clear, ATOM_ARG_MC },
    { atom_op_nop, 0 },
    { atom_op_eot, 0 },
    { atom_op_mask, ATOM_ARG_REG },
    { atom_op_mask, ATOM_ARG_PS },
    { atom_op_mask, ATOM_ARG_WS },
    { atom_op_mask, ATOM_ARG_FB },
    { atom_op_mask, ATOM_ARG_PLL },
    { atom_op_mask, ATOM_ARG_MC },
    { atom_op_postcard, 0 },
    { atom_op_beep, 0 },
    { atom_op_savereg, 0 },
    { atom_op_restorereg, 0 },
    { atom_op_setdatablock, 0 },
    { atom_op_xor, ATOM_ARG_REG },
    { atom_op_xor, ATOM_ARG_PS },
    { atom_op_xor, ATOM_ARG_WS },
    { atom_op_xor, ATOM_ARG_FB },
    { atom_op_xor, ATOM_ARG_PLL },
    { atom_op_xor, ATOM_ARG_MC },
    { atom_op_shl, ATOM_ARG_REG },
    { atom_op_shl, ATOM_ARG_PS },
    { atom_op_shl, ATOM_ARG_WS },
    { atom_op_shl, ATOM_ARG_FB },
    { atom_op_shl, ATOM_ARG_PLL },
    { atom_op_shl, ATOM_ARG_MC },
    { atom_op_shr, ATOM_ARG_REG },
    { atom_op_shr, ATOM_ARG_PS },
    { atom_op_shr, ATOM_ARG_WS },
    { atom_op_shr, ATOM_ARG_FB },
    { atom_op_shr, ATOM_ARG_PLL },
    { atom_op_shr, ATOM_ARG_MC },
    { atom_op_debug, 0 },
};

void atom_execute_table(struct atom_context *ctx, int index, uint32_t *params)
{
    int base = CU16(ctx->cmd_table+4+2*index);
    int len, ws, ps, ptr;
    unsigned char op;
    atom_exec_context ectx;

    if(!base)
      return;

    len = CU16(base+ATOM_CT_SIZE_PTR);
    ws = CU8(base+ATOM_CT_WS_PTR);
    ps = CU8(base+ATOM_CT_PS_PTR) & ATOM_CT_PS_MASK;
    ptr = base+ATOM_CT_CODE_PTR;

    SDEBUG(">> execute %04X (len %d, WS %d, PS %d)\n", base, len, ws, ps);

    /* reset reg block */
    ctx->reg_block = 0;
    ectx.ctx = ctx;
    ectx.ps_shift = ps/4;
    ectx.start = base;
    ectx.ps = params;
    if(ws)
      ectx.ws = kzalloc(4*ws, GFP_KERNEL);
    else
      ectx.ws = NULL;

    debug_depth++;
    while(1) {
      op = CU8(ptr++);
      if(op<ATOM_OP_NAMES_CNT)
          SDEBUG("%s @ 0x%04X\n", atom_op_names[op], ptr-1);
      else
          SDEBUG("[%d] @ 0x%04X\n", op, ptr-1);

      if(op<ATOM_OP_CNT && op>0)
          opcode_table[op].func(&ectx, &ptr, opcode_table[op].arg);
      else
          break;

      if(op == ATOM_OP_EOT)
          break;
    }
    debug_depth--;
    SDEBUG("<<\n");

    if(ws)
      kfree(ectx.ws);
}

static int atom_iio_len[] = { 1, 2, 3, 3, 3, 3, 4, 4, 4, 3 };
static void atom_index_iio(struct atom_context *ctx, int base)
{
    ctx->iio = kzalloc(2*256, GFP_KERNEL);
    while(CU8(base) == ATOM_IIO_START) {
      ctx->iio[CU8(base+1)] = base+2;
      base += 2;
      while(CU8(base) != ATOM_IIO_END)
          base += atom_iio_len[CU8(base)];
      base += 3;
    }
}

struct atom_context *atom_parse(struct card_info *card, void *bios)
{
    int base;
    struct atom_context *ctx = kzalloc(sizeof(struct atom_context), GFP_KERNEL);
    char *str;

    ctx->card = card;
    ctx->bios = bios;

    if(CU16(0) != ATOM_BIOS_MAGIC) {
      printk(KERN_INFO "Invalid BIOS magic.\n");
      kfree(ctx);
      return NULL;
    }
    if(strncmp(CSTR(ATOM_ATI_MAGIC_PTR), ATOM_ATI_MAGIC, strlen(ATOM_ATI_MAGIC))) {
      printk(KERN_INFO "Invalid ATI magic.\n");
      kfree(ctx);
      return NULL;
    }

    base = CU16(ATOM_ROM_TABLE_PTR);
    if(strncmp(CSTR(base+ATOM_ROM_MAGIC_PTR), ATOM_ROM_MAGIC, strlen(ATOM_ROM_MAGIC))) {
      printk(KERN_INFO "Invalid ATOM magic.\n");
      kfree(ctx);
      return NULL;
    }

    ctx->atom_fb_scratch=kzalloc(20*1024, GFP_KERNEL);
    ctx->cmd_table = CU16(base+ATOM_ROM_CMD_PTR);
    ctx->data_table = CU16(base+ATOM_ROM_DATA_PTR);
    atom_index_iio(ctx, CU16(ctx->data_table+ATOM_DATA_IIO_PTR)+4);

    str = CSTR(CU16(base+ATOM_ROM_MSG_PTR));
    while(*str && ((*str == '\n') || (*str == '\r')))
      str++;
    printk(KERN_INFO "ATOM BIOS: %s", str);

    return ctx;
}

int atom_asic_init(struct atom_context *ctx)
{
    int hwi = CU16(ctx->data_table + ATOM_DATA_FWI_PTR);
    uint32_t ps[16];
    memset(ps, 0, 64);

    ps[0] = CU32(hwi + ATOM_FWI_DEFSCLK_PTR);
    ps[1] = CU32(hwi + ATOM_FWI_DEFMCLK_PTR);
    if(!ps[0] || !ps[1])
      return 1;

    if(!CU16(ctx->cmd_table+4+2*ATOM_CMD_INIT))
      return 1;
    atom_execute_table(ctx, ATOM_CMD_INIT, ps);

    return 0;
}

void atom_destroy(struct atom_context *ctx)
{
    if(ctx->iio)
      kfree(ctx->iio);
    kfree(ctx);
}


void atom_parse_data_header(struct atom_context *ctx, int index, uint16_t *size, uint8_t *frev, uint8_t *crev, uint16_t *data_start)
{
      int offset = index * 2 + 4;
      int idx = CU16(ctx->data_table + offset);

      if (size)
            *size = CU16(idx);
      if (frev)
            *frev = CU8(idx + 2);
      if (crev)
            *crev = CU8(idx + 3);
      *data_start = idx;
      return;
}

void atom_parse_cmd_header(struct atom_context *ctx, int index, uint8_t *frev, uint8_t *crev)
{
      int offset = index * 2 + 4;
      int idx = CU16(ctx->cmd_table + offset);

      if (frev)
            *frev = CU8(idx + 2);
      if (crev)
            *crev = CU8(idx + 3);
      return;
}

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