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cfe_api.c

/*
 * Copyright (C) 2000, 2001, 2002 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

/*
 *
 * Broadcom Common Firmware Environment (CFE)
 *
 * This module contains device function stubs (small routines to
 * call the standard "iocb" interface entry point to CFE).
 * There should be one routine here per iocb function call.
 *
 * Authors:  Mitch Lichtenberg, Chris Demetriou
 */

#include <asm/fw/cfe/cfe_api.h>
#include "cfe_api_int.h"

/* Cast from a native pointer to a cfe_xptr_t and back.      */
#define XPTR_FROM_NATIVE(n)   ((cfe_xptr_t) (intptr_t) (n))
#define NATIVE_FROM_XPTR(x)   ((void *) (intptr_t) (x))

int cfe_iocb_dispatch(struct cfe_xiocb *xiocb);

/*
 * Declare the dispatch function with args of "intptr_t".
 * This makes sure whatever model we're compiling in
 * puts the pointers in a single register.  For example,
 * combining -mlong64 and -mips1 or -mips2 would lead to
 * trouble, since the handle and IOCB pointer will be
 * passed in two registers each, and CFE expects one.
 */

static int (*cfe_dispfunc) (intptr_t handle, intptr_t xiocb) = 0;
static u64 cfe_handle = 0;

int cfe_init(u64 handle, u64 ept)
{
      cfe_dispfunc = NATIVE_FROM_XPTR(ept);
      cfe_handle = handle;
      return 0;
}

int cfe_iocb_dispatch(struct cfe_xiocb * xiocb)
{
      if (!cfe_dispfunc)
            return -1;
      return (*cfe_dispfunc) ((intptr_t) cfe_handle, (intptr_t) xiocb);
}

int cfe_close(int handle)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_DEV_CLOSE;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = handle;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = 0;

      cfe_iocb_dispatch(&xiocb);

      return xiocb.xiocb_status;

}

int cfe_cpu_start(int cpu, void (*fn) (void), long sp, long gp, long a1)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_FW_CPUCTL;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_cpuctl);
      xiocb.plist.xiocb_cpuctl.cpu_number = cpu;
      xiocb.plist.xiocb_cpuctl.cpu_command = CFE_CPU_CMD_START;
      xiocb.plist.xiocb_cpuctl.gp_val = gp;
      xiocb.plist.xiocb_cpuctl.sp_val = sp;
      xiocb.plist.xiocb_cpuctl.a1_val = a1;
      xiocb.plist.xiocb_cpuctl.start_addr = (long) fn;

      cfe_iocb_dispatch(&xiocb);

      return xiocb.xiocb_status;
}

int cfe_cpu_stop(int cpu)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_FW_CPUCTL;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_cpuctl);
      xiocb.plist.xiocb_cpuctl.cpu_number = cpu;
      xiocb.plist.xiocb_cpuctl.cpu_command = CFE_CPU_CMD_STOP;

      cfe_iocb_dispatch(&xiocb);

      return xiocb.xiocb_status;
}

int cfe_enumenv(int idx, char *name, int namelen, char *val, int vallen)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_ENV_SET;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
      xiocb.plist.xiocb_envbuf.enum_idx = idx;
      xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
      xiocb.plist.xiocb_envbuf.name_length = namelen;
      xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(val);
      xiocb.plist.xiocb_envbuf.val_length = vallen;

      cfe_iocb_dispatch(&xiocb);

      return xiocb.xiocb_status;
}

int
cfe_enummem(int idx, int flags, u64 *start, u64 *length, u64 *type)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_FW_MEMENUM;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = flags;
      xiocb.xiocb_psize = sizeof(struct xiocb_meminfo);
      xiocb.plist.xiocb_meminfo.mi_idx = idx;

      cfe_iocb_dispatch(&xiocb);

      if (xiocb.xiocb_status < 0)
            return xiocb.xiocb_status;

      *start = xiocb.plist.xiocb_meminfo.mi_addr;
      *length = xiocb.plist.xiocb_meminfo.mi_size;
      *type = xiocb.plist.xiocb_meminfo.mi_type;

      return 0;
}

int cfe_exit(int warm, int status)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_FW_RESTART;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = warm ? CFE_FLG_WARMSTART : 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_exitstat);
      xiocb.plist.xiocb_exitstat.status = status;

      cfe_iocb_dispatch(&xiocb);

      return xiocb.xiocb_status;
}

int cfe_flushcache(int flg)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_FW_FLUSHCACHE;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = flg;
      xiocb.xiocb_psize = 0;

      cfe_iocb_dispatch(&xiocb);

      return xiocb.xiocb_status;
}

int cfe_getdevinfo(char *name)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_DEV_GETINFO;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
      xiocb.plist.xiocb_buffer.buf_offset = 0;
      xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(name);
      xiocb.plist.xiocb_buffer.buf_length = strlen(name);

      cfe_iocb_dispatch(&xiocb);

      if (xiocb.xiocb_status < 0)
            return xiocb.xiocb_status;
      return xiocb.plist.xiocb_buffer.buf_ioctlcmd;
}

int cfe_getenv(char *name, char *dest, int destlen)
{
      struct cfe_xiocb xiocb;

      *dest = 0;

      xiocb.xiocb_fcode = CFE_CMD_ENV_GET;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
      xiocb.plist.xiocb_envbuf.enum_idx = 0;
      xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
      xiocb.plist.xiocb_envbuf.name_length = strlen(name);
      xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(dest);
      xiocb.plist.xiocb_envbuf.val_length = destlen;

      cfe_iocb_dispatch(&xiocb);

      return xiocb.xiocb_status;
}

int cfe_getfwinfo(cfe_fwinfo_t * info)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_FW_GETINFO;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_fwinfo);

      cfe_iocb_dispatch(&xiocb);

      if (xiocb.xiocb_status < 0)
            return xiocb.xiocb_status;

      info->fwi_version = xiocb.plist.xiocb_fwinfo.fwi_version;
      info->fwi_totalmem = xiocb.plist.xiocb_fwinfo.fwi_totalmem;
      info->fwi_flags = xiocb.plist.xiocb_fwinfo.fwi_flags;
      info->fwi_boardid = xiocb.plist.xiocb_fwinfo.fwi_boardid;
      info->fwi_bootarea_va = xiocb.plist.xiocb_fwinfo.fwi_bootarea_va;
      info->fwi_bootarea_pa = xiocb.plist.xiocb_fwinfo.fwi_bootarea_pa;
      info->fwi_bootarea_size =
          xiocb.plist.xiocb_fwinfo.fwi_bootarea_size;
#if 0
      info->fwi_reserved1 = xiocb.plist.xiocb_fwinfo.fwi_reserved1;
      info->fwi_reserved2 = xiocb.plist.xiocb_fwinfo.fwi_reserved2;
      info->fwi_reserved3 = xiocb.plist.xiocb_fwinfo.fwi_reserved3;
#endif

      return 0;
}

int cfe_getstdhandle(int flg)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_DEV_GETHANDLE;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = flg;
      xiocb.xiocb_psize = 0;

      cfe_iocb_dispatch(&xiocb);

      if (xiocb.xiocb_status < 0)
            return xiocb.xiocb_status;
      return xiocb.xiocb_handle;
}

int64_t
cfe_getticks(void)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_FW_GETTIME;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_time);
      xiocb.plist.xiocb_time.ticks = 0;

      cfe_iocb_dispatch(&xiocb);

      return xiocb.plist.xiocb_time.ticks;

}

int cfe_inpstat(int handle)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_DEV_INPSTAT;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = handle;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_inpstat);
      xiocb.plist.xiocb_inpstat.inp_status = 0;

      cfe_iocb_dispatch(&xiocb);

      if (xiocb.xiocb_status < 0)
            return xiocb.xiocb_status;
      return xiocb.plist.xiocb_inpstat.inp_status;
}

int
cfe_ioctl(int handle, unsigned int ioctlnum, unsigned char *buffer,
        int length, int *retlen, u64 offset)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_DEV_IOCTL;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = handle;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
      xiocb.plist.xiocb_buffer.buf_offset = offset;
      xiocb.plist.xiocb_buffer.buf_ioctlcmd = ioctlnum;
      xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
      xiocb.plist.xiocb_buffer.buf_length = length;

      cfe_iocb_dispatch(&xiocb);

      if (retlen)
            *retlen = xiocb.plist.xiocb_buffer.buf_retlen;
      return xiocb.xiocb_status;
}

int cfe_open(char *name)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_DEV_OPEN;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
      xiocb.plist.xiocb_buffer.buf_offset = 0;
      xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(name);
      xiocb.plist.xiocb_buffer.buf_length = strlen(name);

      cfe_iocb_dispatch(&xiocb);

      if (xiocb.xiocb_status < 0)
            return xiocb.xiocb_status;
      return xiocb.xiocb_handle;
}

int cfe_read(int handle, unsigned char *buffer, int length)
{
      return cfe_readblk(handle, 0, buffer, length);
}

int cfe_readblk(int handle, s64 offset, unsigned char *buffer, int length)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_DEV_READ;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = handle;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
      xiocb.plist.xiocb_buffer.buf_offset = offset;
      xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
      xiocb.plist.xiocb_buffer.buf_length = length;

      cfe_iocb_dispatch(&xiocb);

      if (xiocb.xiocb_status < 0)
            return xiocb.xiocb_status;
      return xiocb.plist.xiocb_buffer.buf_retlen;
}

int cfe_setenv(char *name, char *val)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_ENV_SET;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = 0;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
      xiocb.plist.xiocb_envbuf.enum_idx = 0;
      xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
      xiocb.plist.xiocb_envbuf.name_length = strlen(name);
      xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(val);
      xiocb.plist.xiocb_envbuf.val_length = strlen(val);

      cfe_iocb_dispatch(&xiocb);

      return xiocb.xiocb_status;
}

int cfe_write(int handle, unsigned char *buffer, int length)
{
      return cfe_writeblk(handle, 0, buffer, length);
}

int cfe_writeblk(int handle, s64 offset, unsigned char *buffer, int length)
{
      struct cfe_xiocb xiocb;

      xiocb.xiocb_fcode = CFE_CMD_DEV_WRITE;
      xiocb.xiocb_status = 0;
      xiocb.xiocb_handle = handle;
      xiocb.xiocb_flags = 0;
      xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
      xiocb.plist.xiocb_buffer.buf_offset = offset;
      xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
      xiocb.plist.xiocb_buffer.buf_length = length;

      cfe_iocb_dispatch(&xiocb);

      if (xiocb.xiocb_status < 0)
            return xiocb.xiocb_status;
      return xiocb.plist.xiocb_buffer.buf_retlen;
}

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