pmu.c

  1/*
  2 * Copyright 2014 Red Hat Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 * Authors: Ben Skeggs <bskeggs@redhat.com>
 23 */
 24#include <subdev/bios.h>
 25#include <subdev/bios/bit.h>
 26#include <subdev/bios/image.h>
 27#include <subdev/bios/pmu.h>
 28
 29u32
 30nvbios_pmuTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
 31{
 32	struct bit_entry bit_p;
 33	u32 data = 0;
 34
 35	if (!bit_entry(bios, 'p', &bit_p)) {
 36		if (bit_p.version == 2 && bit_p.length >= 4)
 37			data = nvbios_rd32(bios, bit_p.offset + 0x00);
 38		if (data) {
 39			*ver = nvbios_rd08(bios, data + 0x00); /* maybe? */
 40			*hdr = nvbios_rd08(bios, data + 0x01);
 41			*len = nvbios_rd08(bios, data + 0x02);
 42			*cnt = nvbios_rd08(bios, data + 0x03);
 43		}
 44	}
 45
 46	return data;
 47}
 48
 49u32
 50nvbios_pmuEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
 51{
 52	u8  cnt, len;
 53	u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len);
 54	if (data && idx < cnt) {
 55		data = data + *hdr + (idx * len);
 56		*hdr = len;
 57		return data;
 58	}
 59	return 0;
 60}
 61
 62u32
 63nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
 64	     struct nvbios_pmuE *info)
 65{
 66	u32 data = nvbios_pmuEe(bios, idx, ver, hdr);
 67	if (data) {
 68		info->type = nvbios_rd08(bios, data + 0x00);
 69		info->data = nvbios_rd32(bios, data + 0x02);
 70	}
 71	return data;
 72}
 73
 74bool
 75nvbios_pmuRm(struct nvkm_bios *bios, u8 type, struct nvbios_pmuR *info)
 76{
 77	struct nvbios_pmuE pmuE;
 78	u8  ver, hdr, idx = 0;
 79	u32 data;
 80	memset(info, 0x00, sizeof(*info));
 81	while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) {
 82		if (pmuE.type == type && (data = pmuE.data)) {
 83			info->init_addr_pmu = nvbios_rd32(bios, data + 0x08);
 84			info->args_addr_pmu = nvbios_rd32(bios, data + 0x0c);
 85			info->boot_addr     = data + 0x30;
 86			info->boot_addr_pmu = nvbios_rd32(bios, data + 0x10) +
 87					      nvbios_rd32(bios, data + 0x18);
 88			info->boot_size     = nvbios_rd32(bios, data + 0x1c) -
 89					      nvbios_rd32(bios, data + 0x18);
 90			info->code_addr     = info->boot_addr + info->boot_size;
 91			info->code_addr_pmu = info->boot_addr_pmu +
 92					      info->boot_size;
 93			info->code_size     = nvbios_rd32(bios, data + 0x20);
 94			info->data_addr     = data + 0x30 +
 95					      nvbios_rd32(bios, data + 0x24);
 96			info->data_addr_pmu = nvbios_rd32(bios, data + 0x28);
 97			info->data_size     = nvbios_rd32(bios, data + 0x2c);
 98			return true;
 99		}
100	}
101	return false;
102}