text: /*
   * Copyright 2014 Red Hat 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.
   *
   * Authors: Ben Skeggs <bskeggs@redhat.com>
   */
  
  #include <subdev/bios.h>
  #include <subdev/bios/bit.h>
  #include <subdev/bios/image.h>
  #include <subdev/bios/pmu.h>
  
  static u32
  weirdo_pointer(struct nouveau_bios *bios, u32 data)
  {
  	struct nvbios_image image;
  	int idx = 0;
  	if (nvbios_image(bios, idx++, &image)) {
  		data -= image.size;
  		while (nvbios_image(bios, idx++, &image)) {
  			if (image.type == 0xe0)
  				return image.base + data;
  		}
  	}
  	return 0;
  }
  
  u32
  nvbios_pmuTe(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  {
  	struct bit_entry bit_p;
  	u32 data = 0;
  
  	if (!bit_entry(bios, 'p', &bit_p)) {
  		if (bit_p.version == 2 && bit_p.length >= 4)
  			data = nv_ro32(bios, bit_p.offset + 0x00);
  		if ((data = weirdo_pointer(bios, data))) {
  			*ver = nv_ro08(bios, data + 0x00); /* maybe? */
  			*hdr = nv_ro08(bios, data + 0x01);
  			*len = nv_ro08(bios, data + 0x02);
  			*cnt = nv_ro08(bios, data + 0x03);
  		}
  	}
  
  	return data;
  }
  
  u32
  nvbios_pmuTp(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
  	     struct nvbios_pmuT *info)
  {
  	u32 data = nvbios_pmuTe(bios, ver, hdr, cnt, len);
  	memset(info, 0x00, sizeof(*info));
  	switch (!!data * *ver) {
  	default:
  		break;
  	}
  	return data;
  }
  
  u32
  nvbios_pmuEe(struct nouveau_bios *bios, int idx, u8 *ver, u8 *hdr)
  {
  	u8  cnt, len;
  	u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len);
  	if (data && idx < cnt) {
  		data = data + *hdr + (idx * len);
  		*hdr = len;
  		return data;
  	}
  	return 0;
  }
  
  u32
  nvbios_pmuEp(struct nouveau_bios *bios, int idx, u8 *ver, u8 *hdr,
  	     struct nvbios_pmuE *info)
  {
  	u32 data = nvbios_pmuEe(bios, idx, ver, hdr);
  	memset(info, 0x00, sizeof(*info));
  	switch (!!data * *ver) {
  	default:
  		info->type = nv_ro08(bios, data + 0x00);
  		info->data = nv_ro32(bios, data + 0x02);
  		break;
  	}
  	return data;
  }
  
  bool
  nvbios_pmuRm(struct nouveau_bios *bios, u8 type, struct nvbios_pmuR *info)
  {
  	struct nvbios_pmuE pmuE;
  	u8  ver, hdr, idx = 0;
  	u32 data;
  	memset(info, 0x00, sizeof(*info));
  	while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) {
  		if ( pmuE.type == type &&
  		    (data = weirdo_pointer(bios, pmuE.data))) {
  			info->init_addr_pmu = nv_ro32(bios, data + 0x08);
  			info->args_addr_pmu = nv_ro32(bios, data + 0x0c);
  			info->boot_addr     = data + 0x30;
  			info->boot_addr_pmu = nv_ro32(bios, data + 0x10) +
  					      nv_ro32(bios, data + 0x18);
  			info->boot_size     = nv_ro32(bios, data + 0x1c) -
  					      nv_ro32(bios, data + 0x18);
  			info->code_addr     = info->boot_addr + info->boot_size;
  			info->code_addr_pmu = info->boot_addr_pmu +
  					      info->boot_size;
  			info->code_size     = nv_ro32(bios, data + 0x20);
  			info->data_addr     = data + 0x30 +
  					      nv_ro32(bios, data + 0x24);
  			info->data_addr_pmu = nv_ro32(bios, data + 0x28);
  			info->data_size     = nv_ro32(bios, data + 0x2c);
  			return true;
  		}
  	}
  	return false;
  }
  