LXR uboot/arch/arm/mach-zynqmp/handoff.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright 2016 - 2017 Xilinx, Inc.
   4 *
   5 * Michal Simek <michal.simek@xilinx.com>
   6 */
   7
   8#include <common.h>
   9#include <asm/io.h>
  10#include <asm/arch/hardware.h>
  11#include <asm/arch/sys_proto.h>
  12
  13/*
  14 * atfhandoffparams
  15 * Parameter    bitfield        encoding
  16 * -----------------------------------------------------------------------------
  17 * Exec State   0       0 -> Aarch64, 1-> Aarch32
  18 * endianness   1       0 -> LE, 1 -> BE
  19 * secure (TZ)  2       0 -> Non secure, 1 -> secure
  20 * EL           3:4     00 -> EL0, 01 -> EL1, 10 -> EL2, 11 -> EL3
  21 * CPU#         5:6     00 -> A53_0, 01 -> A53_1, 10 -> A53_2, 11 -> A53_3
  22 */
  23
  24#define FSBL_FLAGS_ESTATE_SHIFT         0
  25#define FSBL_FLAGS_ESTATE_MASK          (1 << FSBL_FLAGS_ESTATE_SHIFT)
  26#define FSBL_FLAGS_ESTATE_A64           0
  27#define FSBL_FLAGS_ESTATE_A32           1
  28
  29#define FSBL_FLAGS_ENDIAN_SHIFT         1
  30#define FSBL_FLAGS_ENDIAN_MASK          (1 << FSBL_FLAGS_ENDIAN_SHIFT)
  31#define FSBL_FLAGS_ENDIAN_LE            0
  32#define FSBL_FLAGS_ENDIAN_BE            1
  33
  34#define FSBL_FLAGS_TZ_SHIFT             2
  35#define FSBL_FLAGS_TZ_MASK              (1 << FSBL_FLAGS_TZ_SHIFT)
  36#define FSBL_FLAGS_NON_SECURE           0
  37#define FSBL_FLAGS_SECURE               1
  38
  39#define FSBL_FLAGS_EL_SHIFT             3
  40#define FSBL_FLAGS_EL_MASK              (3 << FSBL_FLAGS_EL_SHIFT)
  41#define FSBL_FLAGS_EL0                  0
  42#define FSBL_FLAGS_EL1                  1
  43#define FSBL_FLAGS_EL2                  2
  44#define FSBL_FLAGS_EL3                  3
  45
  46#define FSBL_FLAGS_CPU_SHIFT            5
  47#define FSBL_FLAGS_CPU_MASK             (3 << FSBL_FLAGS_CPU_SHIFT)
  48#define FSBL_FLAGS_A53_0                0
  49#define FSBL_FLAGS_A53_1                1
  50#define FSBL_FLAGS_A53_2                2
  51#define FSBL_FLAGS_A53_3                3
  52
  53#define FSBL_MAX_PARTITIONS             8
  54
  55/* Structure corresponding to each partition entry */
  56struct xfsbl_partition {
  57        uint64_t entry_point;
  58        uint64_t flags;
  59};
  60
  61/* Structure for handoff parameters to ARM Trusted Firmware (ATF) */
  62struct xfsbl_atf_handoff_params {
  63        uint8_t magic[4];
  64        uint32_t num_entries;
  65        struct xfsbl_partition partition[FSBL_MAX_PARTITIONS];
  66};
  67
  68#ifdef CONFIG_SPL_ATF
  69struct bl31_params *bl2_plat_get_bl31_params(uintptr_t bl32_entry,
  70                                             uintptr_t bl33_entry,
  71                                             uintptr_t fdt_addr)
  72{
  73        struct xfsbl_atf_handoff_params *atfhandoffparams;
  74
  75        atfhandoffparams = (void *)CONFIG_SPL_TEXT_BASE;
  76        atfhandoffparams->magic[0] = 'X';
  77        atfhandoffparams->magic[1] = 'L';
  78        atfhandoffparams->magic[2] = 'N';
  79        atfhandoffparams->magic[3] = 'X';
  80
  81        atfhandoffparams->num_entries = 0;
  82        if (bl33_entry) {
  83                atfhandoffparams->partition[0].entry_point = bl33_entry;
  84                atfhandoffparams->partition[0].flags = FSBL_FLAGS_EL2 <<
  85                                                       FSBL_FLAGS_EL_SHIFT;
  86                atfhandoffparams->num_entries++;
  87        }
  88
  89        writel(CONFIG_SPL_TEXT_BASE, &pmu_base->gen_storage6);
  90
  91        return NULL;
  92}
  93#endif
  94