mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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165 lines
3.4 KiB
C
165 lines
3.4 KiB
C
/*
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* arch/arm/mach-ns9xxx/include/mach/uncompress.h
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*
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* Copyright (C) 2006 by Digi International Inc.
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* All rights reserved.
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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 of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#ifndef __ASM_ARCH_UNCOMPRESS_H
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#define __ASM_ARCH_UNCOMPRESS_H
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#include <linux/io.h>
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#define __REG(x) ((void __iomem __force *)(x))
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static void putc_dummy(char c, void __iomem *base)
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{
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/* nothing */
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}
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static void putc_ns9360(char c, void __iomem *base)
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{
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static int t = 0x10000;
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do {
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if (t)
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--t;
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if (__raw_readl(base + 8) & (1 << 3)) {
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__raw_writeb(c, base + 16);
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t = 0x10000;
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break;
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}
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} while (t);
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}
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static void putc_a9m9750dev(char c, void __iomem *base)
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{
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static int t = 0x10000;
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do {
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if (t)
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--t;
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if (__raw_readb(base + 5) & (1 << 5)) {
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__raw_writeb(c, base);
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t = 0x10000;
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break;
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}
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} while (t);
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}
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static void putc_ns921x(char c, void __iomem *base)
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{
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static int t = 0x10000;
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do {
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if (t)
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--t;
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if (!(__raw_readl(base) & (1 << 11))) {
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__raw_writeb(c, base + 0x0028);
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t = 0x10000;
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break;
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}
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} while (t);
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}
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#define MSCS __REG(0xA0900184)
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#define NS9360_UARTA __REG(0x90200040)
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#define NS9360_UARTB __REG(0x90200000)
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#define NS9360_UARTC __REG(0x90300000)
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#define NS9360_UARTD __REG(0x90300040)
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#define NS9360_UART_ENABLED(base) \
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(__raw_readl(NS9360_UARTA) & (1 << 31))
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#define A9M9750DEV_UARTA __REG(0x40000000)
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#define NS921XSYS_CLOCK __REG(0xa090017c)
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#define NS921X_UARTA __REG(0x90010000)
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#define NS921X_UARTB __REG(0x90018000)
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#define NS921X_UARTC __REG(0x90020000)
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#define NS921X_UARTD __REG(0x90028000)
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#define NS921X_UART_ENABLED(base) \
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(__raw_readl((base) + 0x1000) & (1 << 29))
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static void autodetect(void (**putc)(char, void __iomem *), void __iomem **base)
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{
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if (((__raw_readl(MSCS) >> 16) & 0xfe) == 0x00) {
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/* ns9360 or ns9750 */
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if (NS9360_UART_ENABLED(NS9360_UARTA)) {
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*putc = putc_ns9360;
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*base = NS9360_UARTA;
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return;
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} else if (NS9360_UART_ENABLED(NS9360_UARTB)) {
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*putc = putc_ns9360;
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*base = NS9360_UARTB;
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return;
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} else if (NS9360_UART_ENABLED(NS9360_UARTC)) {
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*putc = putc_ns9360;
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*base = NS9360_UARTC;
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return;
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} else if (NS9360_UART_ENABLED(NS9360_UARTD)) {
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*putc = putc_ns9360;
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*base = NS9360_UARTD;
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return;
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} else if (__raw_readl(__REG(0xa09001f4)) == 0xfffff001) {
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*putc = putc_a9m9750dev;
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*base = A9M9750DEV_UARTA;
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return;
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}
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} else if (((__raw_readl(MSCS) >> 16) & 0xfe) == 0x02) {
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/* ns921x */
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u32 clock = __raw_readl(NS921XSYS_CLOCK);
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if ((clock & (1 << 1)) &&
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NS921X_UART_ENABLED(NS921X_UARTA)) {
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*putc = putc_ns921x;
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*base = NS921X_UARTA;
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return;
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} else if ((clock & (1 << 2)) &&
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NS921X_UART_ENABLED(NS921X_UARTB)) {
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*putc = putc_ns921x;
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*base = NS921X_UARTB;
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return;
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} else if ((clock & (1 << 3)) &&
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NS921X_UART_ENABLED(NS921X_UARTC)) {
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*putc = putc_ns921x;
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*base = NS921X_UARTC;
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return;
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} else if ((clock & (1 << 4)) &&
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NS921X_UART_ENABLED(NS921X_UARTD)) {
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*putc = putc_ns921x;
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*base = NS921X_UARTD;
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return;
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}
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}
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*putc = putc_dummy;
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}
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void (*myputc)(char, void __iomem *);
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void __iomem *base;
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static void putc(char c)
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{
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myputc(c, base);
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}
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static void arch_decomp_setup(void)
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{
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autodetect(&myputc, &base);
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}
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#define arch_decomp_wdog()
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static void flush(void)
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{
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/* nothing */
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}
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#endif /* ifndef __ASM_ARCH_UNCOMPRESS_H */
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