LXR uboot/arch/arm/mach-owl/soc.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Actions Semi Owl SoCs platform support.
   4 *
   5 * Copyright (C) 2018 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
   6 */
   7
   8#include <cpu_func.h>
   9#include <init.h>
  10#include <asm/cache.h>
  11#include <linux/arm-smccc.h>
  12#include <linux/psci.h>
  13#include <common.h>
  14#include <asm/io.h>
  15#include <asm/mach-types.h>
  16#include <asm/psci.h>
  17
  18#define DMM_INTERLEAVE_PER_CH_CFG       0xe0290028
  19
  20DECLARE_GLOBAL_DATA_PTR;
  21
  22unsigned int owl_get_ddrcap(void)
  23{
  24        unsigned int val, cap;
  25
  26        /* ddr capacity register initialized by ddr driver
  27         * in early bootloader
  28         */
  29#if defined(CONFIG_MACH_S700)
  30        val = (readl(DMM_INTERLEAVE_PER_CH_CFG) >> 8) & 0x7;
  31        cap =  (val + 1) * 256;
  32#elif defined(CONFIG_MACH_S900)
  33        val = (readl(DMM_INTERLEAVE_PER_CH_CFG) >> 8) & 0xf;
  34        cap =  64 * (1 << val);
  35#endif
  36
  37        return cap;
  38}
  39
  40/*
  41 * dram_init - sets uboots idea of sdram size
  42 */
  43int dram_init(void)
  44{
  45        gd->ram_size = owl_get_ddrcap() * 1024 * 1024;
  46        return 0;
  47}
  48
  49/* This is called after dram_init() so use get_ram_size result */
  50int dram_init_banksize(void)
  51{
  52        gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
  53        gd->bd->bi_dram[0].size = gd->ram_size;
  54
  55        return 0;
  56}
  57
  58static void show_psci_version(void)
  59{
  60        struct arm_smccc_res res;
  61
  62        arm_smccc_smc(ARM_PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0, 0, 0, 0, 0, &res);
  63
  64        printf("PSCI:  v%ld.%ld\n",
  65                PSCI_VERSION_MAJOR(res.a0),
  66                PSCI_VERSION_MINOR(res.a0));
  67}
  68
  69int board_init(void)
  70{
  71        show_psci_version();
  72
  73        return 0;
  74}
  75
  76void reset_cpu(ulong addr)
  77{
  78        psci_system_reset();
  79}
  80