LXR uboot/arch/blackfin/include/asm/blackfin

   1/*
   2 * U-boot - blackfin_local.h
   3 *
   4 * Copyright (c) 2005-2007 Analog Devices Inc.
   5 *
   6 * See file CREDITS for list of people who contributed to this
   7 * project.
   8 *
   9 * This program is free software; you can redistribute it and/or
  10 * modify it under the terms of the GNU General Public License as
  11 * published by the Free Software Foundation; either version 2 of
  12 * the License, or (at your option) any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; if not, write to the Free Software
  21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  22 * MA 02110-1301 USA
  23 */
  24
  25#ifndef __BLACKFIN_LOCAL_H__
  26#define __BLACKFIN_LOCAL_H__
  27
  28#include <asm/mem_map.h>
  29
  30#define LO(con32) ((con32) & 0xFFFF)
  31#define lo(con32) ((con32) & 0xFFFF)
  32#define HI(con32) (((con32) >> 16) & 0xFFFF)
  33#define hi(con32) (((con32) >> 16) & 0xFFFF)
  34
  35#define OFFSET_(x) (x & 0x0000FFFF)
  36#define MK_BMSK_(x) (1 << x)
  37
  38/* Ideally this should be USEC not MSEC, but the USEC multiplication
  39 * likes to overflow 32bit quantities which is all our assembler
  40 * currently supports ;(
  41 */
  42#define USEC_PER_MSEC 1000
  43#define MSEC_PER_SEC 1000
  44#define BFIN_SCLK (100000000)
  45#define SCLK_TO_MSEC(sclk) ((MSEC_PER_SEC * ((sclk) / USEC_PER_MSEC)) / (BFIN_SCLK / USEC_PER_MSEC))
  46#define MSEC_TO_SCLK(msec) ((((BFIN_SCLK / USEC_PER_MSEC) * (msec)) / MSEC_PER_SEC) * USEC_PER_MSEC)
  47
  48#define L1_CACHE_SHIFT 5
  49#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
  50
  51#include <linux/linkage.h>
  52#include <asm/cache.h>
  53
  54#ifndef __ASSEMBLY__
  55# ifdef SHARED_RESOURCES
  56#  include <asm/shared_resources.h>
  57# endif
  58
  59# include <linux/types.h>
  60
  61extern u_long get_vco(void);
  62extern u_long get_cclk(void);
  63extern u_long get_sclk(void);
  64
  65# define bfin_revid() (bfin_read_CHIPID() >> 28)
  66
  67extern bool bfin_os_log_check(void);
  68extern void bfin_os_log_dump(void);
  69
  70extern void blackfin_icache_flush_range(const void *, const void *);
  71extern void blackfin_dcache_flush_range(const void *, const void *);
  72extern void blackfin_icache_dcache_flush_range(const void *, const void *);
  73extern void blackfin_dcache_flush_invalidate_range(const void *, const void *);
  74
  75/* Use DMA to move data from on chip to external memory.  The L1 instruction
  76 * regions can only be accessed via DMA, so if the address in question is in
  77 * that region, make sure we attempt to DMA indirectly.
  78 */
  79# ifdef __ADSPBF561__
  80  /* Core B regions all need dma from Core A */
  81#  define addr_bfin_on_chip_mem(addr) \
  82        ((((unsigned long)(addr) & 0xFFF00000) == 0xFFA00000) || \
  83         (((unsigned long)(addr) & 0xFFC00000) == 0xFF400000))
  84# else
  85#  define addr_bfin_on_chip_mem(addr) \
  86        (((unsigned long)(addr) & 0xFFF00000) == 0xFFA00000)
  87# endif
  88
  89# include <asm/system.h>
  90
  91#if ANOMALY_05000198
  92# define NOP_PAD_ANOMALY_05000198 "nop;"
  93#else
  94# define NOP_PAD_ANOMALY_05000198
  95#endif
  96
  97#define _bfin_readX(addr, size, asm_size, asm_ext) ({ \
  98        u32 __v; \
  99        __asm__ __volatile__( \
 100                NOP_PAD_ANOMALY_05000198 \
 101                "%0 = " #asm_size "[%1]" #asm_ext ";" \
 102                : "=d" (__v) \
 103                : "a" (addr) \
 104        ); \
 105        __v; })
 106#define _bfin_writeX(addr, val, size, asm_size) \
 107        __asm__ __volatile__( \
 108                NOP_PAD_ANOMALY_05000198 \
 109                #asm_size "[%0] = %1;" \
 110                : \
 111                : "a" (addr), "d" ((u##size)(val)) \
 112                : "memory" \
 113        )
 114
 115#define bfin_read8(addr)  _bfin_readX(addr,  8, b, (z))
 116#define bfin_read16(addr) _bfin_readX(addr, 16, w, (z))
 117#define bfin_read32(addr) _bfin_readX(addr, 32,  ,    )
 118#define bfin_write8(addr, val)  _bfin_writeX(addr, val,  8, b)
 119#define bfin_write16(addr, val) _bfin_writeX(addr, val, 16, w)
 120#define bfin_write32(addr, val) _bfin_writeX(addr, val, 32,  )
 121
 122#define bfin_read(addr) \
 123({ \
 124        sizeof(*(addr)) == 1 ? bfin_read8(addr)  : \
 125        sizeof(*(addr)) == 2 ? bfin_read16(addr) : \
 126        sizeof(*(addr)) == 4 ? bfin_read32(addr) : \
 127        ({ BUG(); 0; }); \
 128})
 129#define bfin_write(addr, val) \
 130do { \
 131        switch (sizeof(*(addr))) { \
 132        case 1: bfin_write8(addr, val);  break; \
 133        case 2: bfin_write16(addr, val); break; \
 134        case 4: bfin_write32(addr, val); break; \
 135        default: BUG(); \
 136        } \
 137} while (0)
 138
 139#define bfin_write_or(addr, bits) \
 140do { \
 141        typeof(addr) __addr = (addr); \
 142        bfin_write(__addr, bfin_read(__addr) | (bits)); \
 143} while (0)
 144
 145#define bfin_write_and(addr, bits) \
 146do { \
 147        typeof(addr) __addr = (addr); \
 148        bfin_write(__addr, bfin_read(__addr) & (bits)); \
 149} while (0)
 150
 151#define bfin_readPTR(addr) bfin_read32(addr)
 152#define bfin_writePTR(addr, val) bfin_write32(addr, val)
 153
 154/* SSYNC implementation for C file */
 155static inline void SSYNC(void)
 156{
 157        int _tmp;
 158        if (ANOMALY_05000312)
 159                __asm__ __volatile__(
 160                        "cli %0;"
 161                        "nop;"
 162                        "nop;"
 163                        "ssync;"
 164                        "sti %0;"
 165                        : "=d" (_tmp)
 166                );
 167        else if (ANOMALY_05000244)
 168                __asm__ __volatile__(
 169                        "nop;"
 170                        "nop;"
 171                        "nop;"
 172                        "ssync;"
 173                );
 174        else
 175                __asm__ __volatile__("ssync;");
 176}
 177
 178/* CSYNC implementation for C file */
 179static inline void CSYNC(void)
 180{
 181        int _tmp;
 182        if (ANOMALY_05000312)
 183                __asm__ __volatile__(
 184                        "cli %0;"
 185                        "nop;"
 186                        "nop;"
 187                        "csync;"
 188                        "sti %0;"
 189                        : "=d" (_tmp)
 190                );
 191        else if (ANOMALY_05000244)
 192                __asm__ __volatile__(
 193                        "nop;"
 194                        "nop;"
 195                        "nop;"
 196                        "csync;"
 197                );
 198        else
 199                __asm__ __volatile__("csync;");
 200}
 201
 202#else  /* __ASSEMBLY__ */
 203
 204/* SSYNC & CSYNC implementations for assembly files */
 205
 206#define ssync(x) SSYNC(x)
 207#define csync(x) CSYNC(x)
 208
 209#if ANOMALY_05000312
 210#define SSYNC(scratch) cli scratch; nop; nop; SSYNC; sti scratch;
 211#define CSYNC(scratch) cli scratch; nop; nop; CSYNC; sti scratch;
 212
 213#elif ANOMALY_05000244
 214#define SSYNC(scratch) nop; nop; nop; SSYNC;
 215#define CSYNC(scratch) nop; nop; nop; CSYNC;
 216
 217#else
 218#define SSYNC(scratch) SSYNC;
 219#define CSYNC(scratch) CSYNC;
 220
 221#endif /* ANOMALY_05000312 & ANOMALY_05000244 handling */
 222
 223#endif /* __ASSEMBLY__ */
 224
 225#endif
 226