diff options
| -rw-r--r-- | src/soc/broadcom/cygnus/Makefile.inc | 8 | ||||
| -rw-r--r-- | src/soc/broadcom/cygnus/include/soc/addressmap.h (renamed from src/soc/broadcom/cygnus/monotonic_timer.c) | 10 | ||||
| -rw-r--r-- | src/soc/broadcom/cygnus/timer.c | 71 |
3 files changed, 81 insertions, 8 deletions
diff --git a/src/soc/broadcom/cygnus/Makefile.inc b/src/soc/broadcom/cygnus/Makefile.inc index 4d122819a4..244b11f46b 100644 --- a/src/soc/broadcom/cygnus/Makefile.inc +++ b/src/soc/broadcom/cygnus/Makefile.inc @@ -20,18 +20,18 @@ bootblock-y += bootblock.c bootblock-y += cbmem.c bootblock-y += i2c.c -bootblock-y += monotonic_timer.c +bootblock-y += timer.c bootblock-$(CONFIG_SPI_FLASH) += spi.c bootblock-$(CONFIG_CONSOLE_SERIAL) += uart.c verstage-y += i2c.c -verstage-y += monotonic_timer.c +verstage-y += timer.c verstage-$(CONFIG_SPI_FLASH) += spi.c verstage-$(CONFIG_CONSOLE_SERIAL) += uart.c romstage-y += cbmem.c romstage-y += i2c.c -romstage-y += monotonic_timer.c +romstage-y += timer.c romstage-y += romstage.c romstage-y += sdram.c romstage-$(CONFIG_SPI_FLASH) += spi.c @@ -39,7 +39,7 @@ romstage-$(CONFIG_CONSOLE_SERIAL) += uart.c ramstage-y += cbmem.c ramstage-y += i2c.c -ramstage-y += monotonic_timer.c +ramstage-y += timer.c ramstage-$(CONFIG_SPI_FLASH) += spi.c ramstage-$(CONFIG_CONSOLE_SERIAL) += uart.c diff --git a/src/soc/broadcom/cygnus/monotonic_timer.c b/src/soc/broadcom/cygnus/include/soc/addressmap.h index 67694f9947..ef6a709d60 100644 --- a/src/soc/broadcom/cygnus/monotonic_timer.c +++ b/src/soc/broadcom/cygnus/include/soc/addressmap.h @@ -17,8 +17,10 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -#include <timer.h> +#ifndef __SOC_BROADCOM_CYGNUS_ADDRESSMAP_H__ +#define __SOC_BROADCOM_CYGNUS_ADDRESSMAP_H__ -void timer_monotonic_get(struct mono_time *mt) -{ -} +#define IPROC_PERIPH_BASE 0x19020000 +#define IPROC_PERIPH_GLB_TIM_REG_BASE (IPROC_PERIPH_BASE + 0x200) + +#endif /* __SOC_BROADCOM_CYGNUS_ADDRESSMAP_H__ */ diff --git a/src/soc/broadcom/cygnus/timer.c b/src/soc/broadcom/cygnus/timer.c new file mode 100644 index 0000000000..5116389778 --- /dev/null +++ b/src/soc/broadcom/cygnus/timer.c @@ -0,0 +1,71 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2015 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 <arch/io.h> +#include <delay.h> +#include <soc/addressmap.h> +#include <timer.h> + +#define TIMER_GLB_TIM_CTRL_PRESC_MASK 0x0000FF00 +#define TIMER_GLB_TIM_CTRL_TIM_EN 0x00000001 +#define TIMER_GLB_TIM_CTRL_PRESC 0x0 +/* + * arm clk is 1GHz, periph_clk=arm_clk/2, tick per usec. + * arm clk is set by the bootrom. See util/broadcom/unauth.cfg for details. + */ +#define PERIPH_CLOCK 500 +#define CLOCKS_PER_USEC (PERIPH_CLOCK / \ + (((TIMER_GLB_TIM_CTRL_PRESC & TIMER_GLB_TIM_CTRL_PRESC_MASK) >> 8) + 1)) + +struct cygnus_timer { + u32 gtim_glob_low; + u32 gtim_glob_hi; + u32 gtim_glob_ctrl; +}; + +static struct cygnus_timer * const timer_ptr = + (void *)IPROC_PERIPH_GLB_TIM_REG_BASE; + +static inline uint64_t timer_raw_value(void) +{ + uint64_t cur_tick; + uint32_t count_h; + uint32_t count_l; + + do { + count_h = readl(&timer_ptr->gtim_glob_hi); + count_l = readl(&timer_ptr->gtim_glob_low); + cur_tick = readl(&timer_ptr->gtim_glob_hi); + } while (cur_tick != count_h); + + return (cur_tick << 32) + count_l; +} + +void timer_monotonic_get(struct mono_time *mt) +{ + mono_time_set_usecs(mt, timer_raw_value() / CLOCKS_PER_USEC); +} + +void init_timer(void) +{ + writel(TIMER_GLB_TIM_CTRL_PRESC, &timer_ptr->gtim_glob_ctrl); + writel(0, &timer_ptr->gtim_glob_low); + writel(0, &timer_ptr->gtim_glob_hi); + writel(TIMER_GLB_TIM_CTRL_TIM_EN, &timer_ptr->gtim_glob_ctrl); +} |