upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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107 lines
2.3 KiB
107 lines
2.3 KiB
/*
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* Copyright (c) 2012 The Chromium OS Authors.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <malloc.h>
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#include <asm/io.h>
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#include <asm/i8254.h>
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#include <asm/ibmpc.h>
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#include <asm/msr.h>
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#include <asm/u-boot-x86.h>
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DECLARE_GLOBAL_DATA_PTR;
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void timer_set_base(u64 base)
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{
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gd->arch.tsc_base = base;
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}
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/*
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* Get the number of CPU time counter ticks since it was read first time after
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* restart. This yields a free running counter guaranteed to take almost 6
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* years to wrap around even at 100GHz clock rate.
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*/
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u64 get_ticks(void)
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{
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u64 now_tick = rdtsc();
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/* We assume that 0 means the base hasn't been set yet */
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if (!gd->arch.tsc_base)
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panic("No tick base available");
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return now_tick - gd->arch.tsc_base;
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}
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#define PLATFORM_INFO_MSR 0xce
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/* Get the speed of the TSC timer in MHz */
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unsigned long get_tbclk_mhz(void)
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{
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u32 ratio;
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u64 platform_info = native_read_msr(PLATFORM_INFO_MSR);
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/* 100MHz times Max Non Turbo ratio */
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ratio = (platform_info >> 8) & 0xff;
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return 100 * ratio;
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}
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unsigned long get_tbclk(void)
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{
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return get_tbclk_mhz() * 1000 * 1000;
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}
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static ulong get_ms_timer(void)
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{
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return (get_ticks() * 1000) / get_tbclk();
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}
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ulong get_timer(ulong base)
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{
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return get_ms_timer() - base;
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}
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ulong timer_get_us(void)
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{
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return get_ticks() / get_tbclk_mhz();
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}
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ulong timer_get_boot_us(void)
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{
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return timer_get_us();
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}
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void __udelay(unsigned long usec)
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{
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u64 now = get_ticks();
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u64 stop;
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stop = now + usec * get_tbclk_mhz();
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while ((int64_t)(stop - get_ticks()) > 0)
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;
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}
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int timer_init(void)
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{
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#ifdef CONFIG_SYS_PCAT_TIMER
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/* Set up the PCAT timer if required */
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pcat_timer_init();
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#endif
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return 0;
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}
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