diff options
Diffstat (limited to 'arch/arm/boards/grinn-liteboard/lowlevel.c')
-rw-r--r-- | arch/arm/boards/grinn-liteboard/lowlevel.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/arch/arm/boards/grinn-liteboard/lowlevel.c b/arch/arm/boards/grinn-liteboard/lowlevel.c new file mode 100644 index 0000000000..331ccc2283 --- /dev/null +++ b/arch/arm/boards/grinn-liteboard/lowlevel.c @@ -0,0 +1,82 @@ +/* + * Copyright (C) 2018 Grinn + * + * Author: Marcin Niestroj <m.niestroj@grinn-global.com> + * + * 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; version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include <debug_ll.h> +#include <common.h> +#include <linux/sizes.h> +#include <io.h> +#include <image-metadata.h> +#include <asm/barebox-arm-head.h> +#include <asm/barebox-arm.h> +#include <asm/sections.h> +#include <asm/cache.h> +#include <asm/mmu.h> +#include <mach/esdctl.h> +#include <mach/imx6.h> + +static inline void setup_uart(void) +{ + void __iomem *iomuxbase = IOMEM(MX6_IOMUXC_BASE_ADDR); + void __iomem *uart = IOMEM(MX6_UART1_BASE_ADDR); + + relocate_to_current_adr(); + setup_c(); + barrier(); + + imx6_ungate_all_peripherals(); + + writel(0x0, iomuxbase + 0x84); + writel(0x1b0b1, iomuxbase + 0x0310); + + imx6_uart_setup(uart); + + pbl_set_putc(imx_uart_putc, uart); + + putchar('>'); +} + +BAREBOX_IMD_TAG_STRING(liteboard_memsize_SZ_256M, IMD_TYPE_PARAMETER, + "memsize=256", 0); +BAREBOX_IMD_TAG_STRING(liteboard_memsize_SZ_512M, IMD_TYPE_PARAMETER, + "memsize=512", 0); + +extern char __dtb_imx6ul_liteboard_start[]; + +static void __noreturn start_imx6_liteboard(void) +{ + imx6ul_cpu_lowlevel_init(); + + arm_setup_stack(0x00910000 - 8); + + arm_early_mmu_cache_invalidate(); + + if (IS_ENABLED(CONFIG_PBL_CONSOLE)) + setup_uart(); + + imx6ul_barebox_entry(__dtb_imx6ul_liteboard_start + + get_runtime_offset()); +} + +#define LITEBOARD_ENTRY(name, memory_size) \ + ENTRY_FUNCTION(name, r0, r1, r2) \ + { \ + IMD_USED(liteboard_memsize_##memory_size); \ + \ + start_imx6_liteboard(); \ + } + + +LITEBOARD_ENTRY(start_imx6ul_liteboard_256mb, SZ_256M); +LITEBOARD_ENTRY(start_imx6ul_liteboard_512mb, SZ_512M); |