diff options
Diffstat (limited to 'src/cpu/ti/am335x')
| -rw-r--r-- | src/cpu/ti/am335x/Kconfig | 79 | ||||
| -rw-r--r-- | src/cpu/ti/am335x/Makefile.inc | 12 | ||||
| -rw-r--r-- | src/cpu/ti/am335x/bootblock.c | 33 | ||||
| -rw-r--r-- | src/cpu/ti/am335x/dmtimer.c | 29 | ||||
| -rw-r--r-- | src/cpu/ti/am335x/dmtimer.h | 30 | ||||
| -rw-r--r-- | src/cpu/ti/am335x/monotonic_timer.c | 57 | ||||
| -rw-r--r-- | src/cpu/ti/am335x/nand.c | 26 | ||||
| -rw-r--r-- | src/cpu/ti/am335x/timer.c | 51 | ||||
| -rw-r--r-- | src/cpu/ti/am335x/uart.c | 137 | ||||
| -rw-r--r-- | src/cpu/ti/am335x/uart.h | 36 |
10 files changed, 490 insertions, 0 deletions
diff --git a/src/cpu/ti/am335x/Kconfig b/src/cpu/ti/am335x/Kconfig new file mode 100644 index 0000000000..c4ef8f1703 --- /dev/null +++ b/src/cpu/ti/am335x/Kconfig @@ -0,0 +1,79 @@ +config BOOTBLOCK_CPU_INIT + string + default "cpu/ti/am335x/bootblock.c" + help + CPU/SoC-specific bootblock code. This is useful if the + bootblock must load microcode or copy data from ROM before + searching for the bootblock. + +# Example SRAM/iRAM map for Exynos5250 platform: +# +# 0x0202_3400: bootblock, assume up to 32KB in size +# 0x0203_0000: romstage, assume up to 128KB in size. +# 0x0207_8000: stack pointer + +# FIXME: find out where romboot places ml0/coreboot +config BOOTBLOCK_BASE + hex + default 0xdeadbeef + +#config ROMSTAGE_BASE +# hex +# default 0x02030000 +# +# FIXME: this is bullshit. +config ROMSTAGE_SIZE + hex + default 0xa000 + +# Stack may reside in either IRAM or DRAM. We will define it to live +# at the top of IRAM for now. +# +# Stack grows downward, push operation stores register contents in +# consecutive memory locations ending just below SP +config STACK_TOP + hex + default 0x02078000 + +config STACK_BOTTOM + hex + default 0x02077000 + +config STACK_SIZE + hex + default 0x1000 + +config CBFS_ROM_OFFSET + # Calculated by BL1 + max bootblock size. + hex "offset of CBFS data in ROM" + default 0x0A000 + +## TODO Change this to some better address not overlapping bootblock when +## cbfstool supports creating header in arbitrary location. +config CBFS_HEADER_ROM_OFFSET + hex "offset of master CBFS header in ROM" + default 0x40 + +## TODO We may probably move this to board-specific implementation files instead +## of KConfig values. +#config CBFS_CACHE_ADDRESS +# hex "memory address to put CBFS cache data" +# default 0x02060000 +# +#config CBFS_CACHE_SIZE +# hex "size of CBFS cache data" +# default 0x000017000 + +# FIXME: other magic numbers that should probably go away +config XIP_ROM_SIZE + hex + default ROMSTAGE_SIZE + +config SYS_SDRAM_BASE + hex + default 0x40000000 + +# FIXME: this can probably be smaller +config COREBOOT_TABLES_SIZE + hex + default 0x800 diff --git a/src/cpu/ti/am335x/Makefile.inc b/src/cpu/ti/am335x/Makefile.inc new file mode 100644 index 0000000000..8c4c663113 --- /dev/null +++ b/src/cpu/ti/am335x/Makefile.inc @@ -0,0 +1,12 @@ +bootblock-y += dmtimer.c +bootblock-y += nand.c +bootblock-$(CONFIG_EARLY_CONSOLE) += uart.c + +romstage-y += nand.c +romstage-y += uart.c + +ramstage-y += dmtimer.c +ramstage-y += monotonic_timer.c +ramstage-y += nand.c +ramstage-y += timer.c +ramstage-y += uart.c diff --git a/src/cpu/ti/am335x/bootblock.c b/src/cpu/ti/am335x/bootblock.c new file mode 100644 index 0000000000..e9434a1fae --- /dev/null +++ b/src/cpu/ti/am335x/bootblock.c @@ -0,0 +1,33 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * 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 of the License. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <types.h> + +#include <arch/cache.h> + +void bootblock_cpu_init(void); +void bootblock_cpu_init(void) +{ + uint32_t sctlr; + + /* enable dcache */ + sctlr = read_sctlr(); + sctlr |= SCTLR_C; + write_sctlr(sctlr); +} diff --git a/src/cpu/ti/am335x/dmtimer.c b/src/cpu/ti/am335x/dmtimer.c new file mode 100644 index 0000000000..6a55d9d105 --- /dev/null +++ b/src/cpu/ti/am335x/dmtimer.c @@ -0,0 +1,29 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google, Inc. + * + * 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 of the License. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "dmtimer.h" + +void dmtimer_start(int num) +{ +} + +uint64_t dmtimer_raw_value(int num) +{ + return 0; +} diff --git a/src/cpu/ti/am335x/dmtimer.h b/src/cpu/ti/am335x/dmtimer.h new file mode 100644 index 0000000000..12ca43801e --- /dev/null +++ b/src/cpu/ti/am335x/dmtimer.h @@ -0,0 +1,30 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google, Inc. + * + * 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 of the License. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef __CPU_TI_AM335X_DMTIMER_H__ +#define __CPU_TI_AM335X_DMTIMER_H__ + +#include <stdint.h> + +#define OSC_HZ 24000000 + +void dmtimer_start(int num); +uint64_t dmtimer_raw_value(int num); + +#endif diff --git a/src/cpu/ti/am335x/monotonic_timer.c b/src/cpu/ti/am335x/monotonic_timer.c new file mode 100644 index 0000000000..9a9083cd70 --- /dev/null +++ b/src/cpu/ti/am335x/monotonic_timer.c @@ -0,0 +1,57 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google, Inc. + * + * 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 of the License. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> +#include <delay.h> +#include <timer.h> + +#include "dmtimer.h" + +static struct monotonic_counter { + int initialized; + struct mono_time time; + uint64_t last_value; +} mono_counter; + +static const uint32_t clocks_per_usec = OSC_HZ/1000000; + +void timer_monotonic_get(struct mono_time *mt) +{ + uint64_t current_tick; + uint64_t usecs_elapsed; + + if (!mono_counter.initialized) { + init_timer(); + mono_counter.last_value = dmtimer_raw_value(0); + mono_counter.initialized = 1; + } + + current_tick = dmtimer_raw_value(0); + usecs_elapsed = (current_tick - mono_counter.last_value) / + clocks_per_usec; + + /* Update current time and tick values only if a full tick occurred. */ + if (usecs_elapsed) { + mono_time_add_usecs(&mono_counter.time, usecs_elapsed); + mono_counter.last_value = current_tick; + } + + /* Save result. */ + *mt = mono_counter.time; +} diff --git a/src/cpu/ti/am335x/nand.c b/src/cpu/ti/am335x/nand.c new file mode 100644 index 0000000000..ddab389eda --- /dev/null +++ b/src/cpu/ti/am335x/nand.c @@ -0,0 +1,26 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * 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 of the License. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <cbfs.h> + +int init_default_cbfs_media(struct cbfs_media *media) +{ + /* FIXME: add support for reading coreboot from NAND */ + return 0; +} diff --git a/src/cpu/ti/am335x/timer.c b/src/cpu/ti/am335x/timer.c new file mode 100644 index 0000000000..07b162a0ee --- /dev/null +++ b/src/cpu/ti/am335x/timer.c @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2013 Google Inc. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <console/console.h> +#include <delay.h> +#include <timer.h> + +void init_timer(void) +{ +} + +/* delay x useconds */ +void udelay(unsigned usec) +{ + struct mono_time current, end; + + timer_monotonic_get(¤t); + end = current; + mono_time_add_usecs(&end, usec); + + if (mono_time_after(¤t, &end)) { + printk(BIOS_EMERG, "udelay: 0x%08x is impossibly large\n", + usec); + /* There's not much we can do if usec is too big. Use a long, + * paranoid delay value and hope for the best... */ + end = current; + mono_time_add_usecs(&end, USECS_PER_SEC); + } + + while (mono_time_before(¤t, &end)) + timer_monotonic_get(¤t); +} diff --git a/src/cpu/ti/am335x/uart.c b/src/cpu/ti/am335x/uart.c new file mode 100644 index 0000000000..fdf5c05908 --- /dev/null +++ b/src/cpu/ti/am335x/uart.c @@ -0,0 +1,137 @@ +/* + * (C) Copyright 2009 SAMSUNG Electronics + * Minkyu Kang <mk7.kang@samsung.com> + * Heungjun Kim <riverful.kim@samsung.com> + * + * based on drivers/serial/s3c64xx.c + * + * 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. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <types.h> +#include <uart.h> +#include <arch/io.h> + +#include <console/console.h> /* for __console definition */ + +#include <cpu/ti/am335x/uart.h> + +#define RX_FIFO_COUNT_MASK 0xff +#define RX_FIFO_FULL_MASK (1 << 8) +#define TX_FIFO_FULL_MASK (1 << 24) + +/* + * Initialise the serial port with the given baudrate. The settings + * are always 8 data bits, no parity, 1 stop bit, no start bits. + */ +static void am335x_uart_init_dev(void) +{ + /* FIXME: implement this + * ref: section 19.4.1.1.1 for reset + * ref: section 19.4.1.1.2 for FIFO, skip DMA + * ref: section 19.4.1.1.3 for baud rate, skip + * interrupts and protocol stuff. + * */ +#if 0 + struct s5p_uart *uart = (struct s5p_uart *)base_port; + + // TODO initialize with correct peripheral id by base_port. + exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE); + + /* enable FIFOs */ + writel(0x1, &uart->ufcon); + writel(0, &uart->umcon); + /* 8N1 */ + writel(0x3, &uart->ulcon); + /* No interrupts, no DMA, pure polling */ + writel(0x245, &uart->ucon); + + serial_setbrg_dev(); +#endif +} + +/* + * Read a single byte from the serial port. Returns 1 on success, 0 + * otherwise. When the function is succesfull, the character read is + * written into its argument c. + */ +static unsigned char am335x_uart_rx_byte(void) +{ + /* FIXME: stub */ +#if 0 + struct s5p_uart *uart = (struct s5p_uart *)base_port; + + /* wait for character to arrive */ + while (!(readl(&uart->ufstat) & (RX_FIFO_COUNT_MASK | + RX_FIFO_FULL_MASK))) { + if (exynos5_uart_err_check(0)) + return 0; + } + + return readb(&uart->urxh) & 0xff; +#endif + return 0xaa; +} + +/* + * Output a single byte to the serial port. + */ +static void am335x_uart_tx_byte(unsigned char data) +{ + /* FIXME: stub */ +#if 0 + struct s5p_uart *uart = (struct s5p_uart *)base_port; + + /* wait for room in the tx FIFO */ + while ((readl(&uart->ufstat) & TX_FIFO_FULL_MASK)) { + if (exynos5_uart_err_check(1)) + return; + } + + writeb(data, &uart->utxh); +#endif +} + +uint32_t uartmem_getbaseaddr(void) +{ + return CONFIG_CONSOLE_SERIAL_UART_ADDRESS; +} + +#if !defined(__PRE_RAM__) +static const struct console_driver exynos5_uart_console __console = { + .init = am335x_uart_init_dev, + .tx_byte = am335x_uart_tx_byte, + .rx_byte = am335x_uart_rx_byte, +}; +#else +void uart_init(void) +{ + am335x_uart_init_dev(); +} + +unsigned char uart_rx_byte(void) +{ + return am335x_uart_rx_byte(); +} + +void uart_tx_byte(unsigned char data) +{ + am335x_uart_tx_byte(data); +} + +void uart_tx_flush(void) { +} +#endif diff --git a/src/cpu/ti/am335x/uart.h b/src/cpu/ti/am335x/uart.h new file mode 100644 index 0000000000..b642e9c41a --- /dev/null +++ b/src/cpu/ti/am335x/uart.h @@ -0,0 +1,36 @@ +/* + * (C) Copyright 2012 The ChromiumOS Authors + * (C) Copyright 2009 Samsung Electronics + * Minkyu Kang <mk7.kang@samsung.com> + * Heungjun Kim <riverful.kim@samsung.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; either version 2 of + * the License, or (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * This file is based off of arch/arm/include/asm/arch-exynos5/uart.h + * from u-boot. + */ + +#ifndef __AM335X_UART_H_ +#define __AM335X_UART_H + +#define AM335X_UART0_BASE 0x44e09000 +#define AM335X_UART1_BASE 0x48020000 +#define AM335X_UART2_BASE 0x48024000 +#define AM335X_UART3_BASE 0x481A6000 +#define AM335X_UART4_BASE 0x481A8000 +#define AM335X_UART5_BASE 0x481AA000 + +#endif |