136 lines
2.7 KiB
C
136 lines
2.7 KiB
C
/*
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* Pistachio platform setup
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*
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* Copyright (C) 2014 Google, Inc.
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* Copyright (C) 2016 Imagination Technologies
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/of_address.h>
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#include <linux/of_fdt.h>
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#include <asm/cacheflush.h>
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#include <asm/dma-coherence.h>
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#include <asm/fw/fw.h>
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#include <asm/mips-boards/generic.h>
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#include <asm/mips-cm.h>
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#include <asm/mips-cpc.h>
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#include <asm/prom.h>
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#include <asm/smp-ops.h>
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#include <asm/traps.h>
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/*
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* Core revision register decoding
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* Bits 23 to 20: Major rev
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* Bits 15 to 8: Minor rev
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* Bits 7 to 0: Maintenance rev
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*/
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#define PISTACHIO_CORE_REV_REG 0xB81483D0
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#define PISTACHIO_CORE_REV_A1 0x00100006
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#define PISTACHIO_CORE_REV_B0 0x00100106
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const char *get_system_type(void)
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{
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u32 core_rev;
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const char *sys_type;
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core_rev = __raw_readl((const void *)PISTACHIO_CORE_REV_REG);
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switch (core_rev) {
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case PISTACHIO_CORE_REV_B0:
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sys_type = "IMG Pistachio SoC (B0)";
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break;
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case PISTACHIO_CORE_REV_A1:
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sys_type = "IMG Pistachio SoC (A1)";
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break;
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default:
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sys_type = "IMG Pistachio SoC";
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break;
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}
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return sys_type;
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}
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void __init *plat_get_fdt(void)
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{
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if (fw_arg0 != -2)
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panic("Device-tree not present");
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return (void *)fw_arg1;
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}
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void __init plat_mem_setup(void)
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{
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__dt_setup_arch(plat_get_fdt());
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}
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#define DEFAULT_CPC_BASE_ADDR 0x1bde0000
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#define DEFAULT_CDMM_BASE_ADDR 0x1bdd0000
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phys_addr_t mips_cpc_default_phys_base(void)
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{
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return DEFAULT_CPC_BASE_ADDR;
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}
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phys_addr_t mips_cdmm_phys_base(void)
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{
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return DEFAULT_CDMM_BASE_ADDR;
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}
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static void __init mips_nmi_setup(void)
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{
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void *base;
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extern char except_vec_nmi;
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base = cpu_has_veic ?
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(void *)(CAC_BASE + 0xa80) :
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(void *)(CAC_BASE + 0x380);
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memcpy(base, &except_vec_nmi, 0x80);
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flush_icache_range((unsigned long)base,
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(unsigned long)base + 0x80);
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}
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static void __init mips_ejtag_setup(void)
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{
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void *base;
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extern char except_vec_ejtag_debug;
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base = cpu_has_veic ?
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(void *)(CAC_BASE + 0xa00) :
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(void *)(CAC_BASE + 0x300);
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memcpy(base, &except_vec_ejtag_debug, 0x80);
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flush_icache_range((unsigned long)base,
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(unsigned long)base + 0x80);
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}
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void __init prom_init(void)
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{
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board_nmi_handler_setup = mips_nmi_setup;
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board_ejtag_handler_setup = mips_ejtag_setup;
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mips_cm_probe();
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mips_cpc_probe();
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register_cps_smp_ops();
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pr_info("SoC Type: %s\n", get_system_type());
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}
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void __init prom_free_prom_memory(void)
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{
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}
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void __init device_tree_init(void)
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{
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if (!initial_boot_params)
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return;
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unflatten_and_copy_device_tree();
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}
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