89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
/*
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* Copyright (C) 2013 Sascha Hauer <s.hauer@pengutronix.de>
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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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*/
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#include <debug_ll.h>
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#include <common.h>
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#include <sizes.h>
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#include <io.h>
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#include <asm/barebox-arm-head.h>
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#include <asm/barebox-arm.h>
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#include <asm/sections.h>
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#include <asm/cache.h>
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#include <asm/mmu.h>
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#include <mach/imx6-mmdc.h>
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#include <mach/imx6.h>
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static inline void setup_uart(void)
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{
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/* Enable UART for lowlevel debugging purposes */
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writel(0x00000000, 0x021e8080);
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writel(0x00004027, 0x021e8084);
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writel(0x00000704, 0x021e8088);
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writel(0x00000a81, 0x021e8090);
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writel(0x0000002b, 0x021e809c);
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writel(0x00013880, 0x021e80b0);
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writel(0x0000047f, 0x021e80a4);
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writel(0x0000c34f, 0x021e80a8);
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writel(0x00000001, 0x021e8080);
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}
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extern char __dtb_imx6q_mba6x_start[];
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extern char __dtb_imx6dl_mba6x_start[];
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ENTRY_FUNCTION(start_imx6q_mba6x)(void)
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{
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uint32_t fdt;
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__barebox_arm_head();
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arm_cpu_lowlevel_init();
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arm_setup_stack(0x00920000 - 8);
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if (IS_ENABLED(CONFIG_DEBUG_LL)) {
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writel(0x2, 0x020e0338);
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setup_uart();
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putc_ll('a');
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}
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arm_early_mmu_cache_invalidate();
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fdt = (uint32_t)__dtb_imx6q_mba6x_start - get_runtime_offset();
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barebox_arm_entry(0x10000000, SZ_1G, fdt);
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}
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ENTRY_FUNCTION(start_imx6dl_mba6x)(void)
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{
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uint32_t fdt;
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__barebox_arm_head();
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arm_cpu_lowlevel_init();
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arm_setup_stack(0x00920000 - 8);
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if (IS_ENABLED(CONFIG_DEBUG_LL)) {
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writel(0x2, 0x020e035c);
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setup_uart();
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putc_ll('a');
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}
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arm_early_mmu_cache_invalidate();
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fdt = (uint32_t)__dtb_imx6dl_mba6x_start - get_runtime_offset();
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barebox_arm_entry(0x10000000, SZ_512M, fdt);
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}
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