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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* arch/arm/mach-ep93xx/include/mach/uncompress.h
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*
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* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
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*/
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#include <mach/ep93xx-regs.h>
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#include <asm/mach-types.h>
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static unsigned char __raw_readb(unsigned int ptr)
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{
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return *((volatile unsigned char *)ptr);
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}
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static unsigned int __raw_readl(unsigned int ptr)
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{
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return *((volatile unsigned int *)ptr);
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}
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static void __raw_writeb(unsigned char value, unsigned int ptr)
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{
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*((volatile unsigned char *)ptr) = value;
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}
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static void __raw_writel(unsigned int value, unsigned int ptr)
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{
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*((volatile unsigned int *)ptr) = value;
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}
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#define PHYS_UART_DATA (CONFIG_DEBUG_UART_PHYS + 0x00)
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#define PHYS_UART_FLAG (CONFIG_DEBUG_UART_PHYS + 0x18)
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#define UART_FLAG_TXFF 0x20
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static inline void putc(int c)
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{
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int i;
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for (i = 0; i < 10000; i++) {
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/* Transmit fifo not full? */
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if (!(__raw_readb(PHYS_UART_FLAG) & UART_FLAG_TXFF))
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break;
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}
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__raw_writeb(c, PHYS_UART_DATA);
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}
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static inline void flush(void)
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{
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}
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/*
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* Some bootloaders don't turn off DMA from the ethernet MAC before
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* jumping to linux, which means that we might end up with bits of RX
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* status and packet data scribbled over the uncompressed kernel image.
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* Work around this by resetting the ethernet MAC before we uncompress.
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*/
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#define PHYS_ETH_SELF_CTL 0x80010020
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#define ETH_SELF_CTL_RESET 0x00000001
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static void ethernet_reset(void)
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{
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unsigned int v;
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/* Reset the ethernet MAC. */
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v = __raw_readl(PHYS_ETH_SELF_CTL);
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__raw_writel(v | ETH_SELF_CTL_RESET, PHYS_ETH_SELF_CTL);
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/* Wait for reset to finish. */
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while (__raw_readl(PHYS_ETH_SELF_CTL) & ETH_SELF_CTL_RESET)
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;
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}
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#define TS72XX_WDT_CONTROL_PHYS_BASE 0x23800000
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#define TS72XX_WDT_FEED_PHYS_BASE 0x23c00000
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#define TS72XX_WDT_FEED_VAL 0x05
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static void __maybe_unused ts72xx_watchdog_disable(void)
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{
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__raw_writeb(TS72XX_WDT_FEED_VAL, TS72XX_WDT_FEED_PHYS_BASE);
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__raw_writeb(0, TS72XX_WDT_CONTROL_PHYS_BASE);
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}
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static void arch_decomp_setup(void)
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{
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if (machine_is_ts72xx())
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ts72xx_watchdog_disable();
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ethernet_reset();
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}
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