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https://github.com/AsahiLinux/u-boot
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5655108a82
This patch adds basic support for AM33xx which is based on ARMV7 Cortex A8 CPU. Signed-off-by: Chandan Nath <chandan.nath@ti.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
130 lines
2.4 KiB
C
130 lines
2.4 KiB
C
/*
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* sys_info.c
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*
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* System information functions
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*
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* Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
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*
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* Derived from Beagle Board and 3430 SDP code by
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* Richard Woodruff <r-woodruff2@ti.com>
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* Syed Mohammed Khasim <khasim@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/clock.h>
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struct ctrl_stat *cstat = (struct ctrl_stat *)CTRL_BASE;
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/**
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* get_cpu_rev(void) - extract rev info
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*/
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u32 get_cpu_rev(void)
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{
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u32 id;
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u32 rev;
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id = readl(DEVICE_ID);
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rev = (id >> 28) & 0xff;
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return rev;
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}
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/**
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* get_cpu_type(void) - extract cpu info
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*/
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u32 get_cpu_type(void)
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{
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u32 id = 0;
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u32 partnum;
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id = readl(DEVICE_ID);
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partnum = (id >> 12) & 0xffff;
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return partnum;
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}
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/**
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* get_board_rev() - setup to pass kernel board revision information
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* returns:(bit[0-3] sub version, higher bit[7-4] is higher version)
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*/
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u32 get_board_rev(void)
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{
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return BOARD_REV_ID;
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}
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/**
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* get_device_type(): tell if GP/HS/EMU/TST
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*/
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u32 get_device_type(void)
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{
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int mode;
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mode = readl(&cstat->statusreg) & (DEVICE_MASK);
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return mode >>= 8;
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}
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/**
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* get_sysboot_value(void) - return SYS_BOOT[4:0]
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*/
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u32 get_sysboot_value(void)
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{
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int mode;
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mode = readl(&cstat->statusreg) & (SYSBOOT_MASK);
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return mode;
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}
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#ifdef CONFIG_DISPLAY_CPUINFO
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/**
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* Print CPU information
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*/
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int print_cpuinfo(void)
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{
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char *cpu_s, *sec_s;
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int arm_freq, ddr_freq;
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switch (get_cpu_type()) {
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case AM335X:
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cpu_s = "AM335X";
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break;
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default:
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cpu_s = "Unknown cpu type";
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break;
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}
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switch (get_device_type()) {
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case TST_DEVICE:
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sec_s = "TST";
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break;
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case EMU_DEVICE:
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sec_s = "EMU";
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break;
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case HS_DEVICE:
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sec_s = "HS";
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break;
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case GP_DEVICE:
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sec_s = "GP";
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break;
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default:
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sec_s = "?";
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}
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printf("AM%s-%s rev %d\n",
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cpu_s, sec_s, get_cpu_rev());
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/* TODO: Print ARM and DDR frequencies */
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return 0;
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}
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#endif /* CONFIG_DISPLAY_CPUINFO */
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