Alexandru Gagniuc (mr.nuke.me@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4698
-gerrit
commit 1ff338c2816a21ff60e43c60526c222982937fe2 Author: Alexandru Gagniuc mr.nuke.me@gmail.com Date: Fri Jan 3 04:24:35 2014 -0500
cpu/allwinner/a10: Add minimal ramstage driver
Change-Id: I857755976b17b0e492c086162f395a77933eeed8 Signed-off-by: Alexandru Gagniuc mr.nuke.me@gmail.com --- src/cpu/allwinner/a10/Makefile.inc | 3 +++ src/cpu/allwinner/a10/cbmem.c | 18 ++++++++++++++ src/cpu/allwinner/a10/chip.h | 11 +++++++++ src/cpu/allwinner/a10/cpu.c | 48 ++++++++++++++++++++++++++++++++++++++ src/cpu/allwinner/a10/ram_segs.h | 30 ++++++++++++++++++++++++ 5 files changed, 110 insertions(+)
diff --git a/src/cpu/allwinner/a10/Makefile.inc b/src/cpu/allwinner/a10/Makefile.inc index 1b720bf..a86d719 100644 --- a/src/cpu/allwinner/a10/Makefile.inc +++ b/src/cpu/allwinner/a10/Makefile.inc @@ -8,6 +8,7 @@ bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart_console.c
romstage-y += bootblock_media.c +romstage-y += cbmem.c romstage-y += clock.c romstage-y += pinmux.c romstage-y += timer.c @@ -16,7 +17,9 @@ romstage-y += uart.c romstage-y += uart_console.c
ramstage-y += bootblock_media.c +ramstage-y += cbmem.c ramstage-y += clock.c +ramstage-y += cpu.c ramstage-y += monotonic_timer.c ramstage-y += timer.c ramstage-y += twi.c diff --git a/src/cpu/allwinner/a10/cbmem.c b/src/cpu/allwinner/a10/cbmem.c new file mode 100644 index 0000000..84dc2bf --- /dev/null +++ b/src/cpu/allwinner/a10/cbmem.c @@ -0,0 +1,18 @@ +/* + * Provides cbmem utilities for romstage and ramstage + * + * Copyright (C) 2013 Alexandru Gagniuc mr.nuke.me@gmail.com + * Subject to the GNU GPL v2, or (at your option) any later version. + */ + +#include "ram_segs.h" +#include <cbmem.h> + +#if IS_ENABLED(CONFIG_DYNAMIC_CBMEM) + +void *cbmem_top(void) +{ + return a1x_get_cbmem_top(); +} + +#endif diff --git a/src/cpu/allwinner/a10/chip.h b/src/cpu/allwinner/a10/chip.h new file mode 100644 index 0000000..16f60c0 --- /dev/null +++ b/src/cpu/allwinner/a10/chip.h @@ -0,0 +1,11 @@ +/* + * Allwinnwer A10 devicetree config struct + * + * Copyright (C) 2013 Alexandru Gagniuc mr.nuke.me@gmail.com + * Subject to the GNU GPL v2, or (at your option) any later version. + */ + +#include <types.h> + +struct cpu_allwinner_a10_config { +}; diff --git a/src/cpu/allwinner/a10/cpu.c b/src/cpu/allwinner/a10/cpu.c new file mode 100644 index 0000000..e0d4cdf --- /dev/null +++ b/src/cpu/allwinner/a10/cpu.c @@ -0,0 +1,48 @@ +/* + * Ramstage initialization for Allwinner CPUs + * + * Copyright (C) 2014 Alexandru Gagniuc mr.nuke.me@gmail.com + * Subject to the GNU GPL v2, or (at your option) any later version. + */ + +#include <console/console.h> +#include <device/device.h> +#include <cpu/cpu.h> +#include <cbmem.h> + + +static void cpu_enable_resources(device_t dev) +{ + ram_resource(dev, 0, CONFIG_SYS_SDRAM_BASE >> 10, + CONFIG_DRAM_SIZE_MB << 10); + /* TODO: Declare CBFS cache as reserved? There's no guarantee we won't + * overwrite it. It seems to stay intact, being so high in RAM + */ +} + +static void cpu_init(device_t dev) +{ + /* TODO: Check if anything else needs to be explicitly initialized */ +} + +static void cpu_noop(device_t dev) +{ +} + +static struct device_operations cpu_ops = { + .read_resources = cpu_noop, + .set_resources = cpu_noop, + .enable_resources = cpu_enable_resources, + .init = cpu_init, + .scan_bus = NULL, +}; + +static void a1x_cpu_enable_dev(device_t dev) +{ + dev->ops = &cpu_ops; +} + +struct chip_operations cpu_allwinner_a10_ops = { + CHIP_NAME("CPU Allwinner A10") + .enable_dev = a1x_cpu_enable_dev, +}; diff --git a/src/cpu/allwinner/a10/ram_segs.h b/src/cpu/allwinner/a10/ram_segs.h new file mode 100644 index 0000000..45141fe --- /dev/null +++ b/src/cpu/allwinner/a10/ram_segs.h @@ -0,0 +1,30 @@ +/* + * How we use DRAM on Allwinner CPUs + * + * Copyright (C) 2014 Alexandru Gagniuc mr.nuke.me@gmail.com + * Subject to the GNU GPL v2, or (at your option) any later version. + */ + +#include <config.h> + +/* + * Put CBMEM at top of RAM + */ +static inline void *a1x_get_cbmem_top(void) +{ + return (void *)CONFIG_SYS_SDRAM_BASE + (CONFIG_DRAM_SIZE_MB << 20); +} + +/* + * By CBFS cache, we mean a cached copy, in RAM, of the entire CBFS region. + */ +static inline void *a1x_get_cbfs_cache_top(void) +{ + /* Arbitrary 16 MiB gap for cbmem tables and bouncebuffer */ + return a1x_get_cbmem_top() - (16 << 20); +} + +static inline void *a1x_get_cbfs_cache_base(void) +{ + return a1x_get_cbfs_cache_top() - CONFIG_ROM_SIZE; +}