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https://github.com/u-boot/u-boot.git
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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2019 Intel Corporation <www.intel.com>
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <init.h>
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#include <log.h>
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#include <asm/arch/slimbootloader.h>
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#include <asm/global_data.h>
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* This sets tsc_base and clock_rate for early_timer and tsc_timer.
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* The performance info guid hob has all performance timestamp data, but
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* the only tsc frequency info is used for the timer driver for now.
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*
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* Slim Bootloader already calibrated TSC and provides it to U-Boot.
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* Therefore, U-Boot does not have to re-calibrate TSC.
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* Configuring tsc_base and clock_rate here makes x86 tsc_timer driver
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* bypass TSC calibration and use the provided TSC frequency.
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*/
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static void tsc_init(void)
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{
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struct sbl_performance_info *data;
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const efi_guid_t guid = SBL_PERFORMANCE_INFO_GUID;
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if (!gd->arch.hob_list)
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panic("hob list not found!");
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gd->arch.tsc_base = rdtsc();
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debug("tsc_base=0x%llx\n", gd->arch.tsc_base);
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data = hob_get_guid_hob_data(gd->arch.hob_list, NULL, &guid);
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if (!data) {
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debug("performance info hob not found\n");
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return;
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}
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/* frequency is in KHz, so to Hz */
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gd->arch.clock_rate = data->frequency * 1000;
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debug("freq=0x%lx\n", gd->arch.clock_rate);
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}
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int arch_cpu_init(void)
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{
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tsc_init();
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return x86_cpu_init_f();
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}
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int checkcpu(void)
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{
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return 0;
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}
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int print_cpuinfo(void)
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{
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return default_print_cpuinfo();
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}
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