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author | Chris Zankel <chris@zankel.net> | 2016-08-10 15:36:44 (GMT) |
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committer | Tom Rini <trini@konsulko.com> | 2016-08-15 22:46:38 (GMT) |
commit | c978b52410016b0ab5a213f235596340af8d45f7 (patch) | |
tree | b01e9a8ea9a92fe962a545974339677b87dcc1ba /arch/xtensa/cpu/cpu.c | |
parent | de5e5cea022ab44006ff1edf45a39f0943fb9dff (diff) | |
download | u-boot-c978b52410016b0ab5a213f235596340af8d45f7.tar.xz |
xtensa: add support for the xtensa processor architecture [2/2]
The Xtensa processor architecture is a configurable, extensible,
and synthesizable 32-bit RISC processor core provided by Tensilica, inc.
This is the second part of the basic architecture port, adding the
'arch/xtensa' directory and a readme file.
Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'arch/xtensa/cpu/cpu.c')
-rw-r--r-- | arch/xtensa/cpu/cpu.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/xtensa/cpu/cpu.c b/arch/xtensa/cpu/cpu.c new file mode 100644 index 0000000..6787a61 --- /dev/null +++ b/arch/xtensa/cpu/cpu.c @@ -0,0 +1,49 @@ +/* + * (C) Copyright 2008 - 2013 Tensilica Inc. + * (C) Copyright 2014 - 2016 Cadence Design Systems Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* + * CPU specific code + */ + +#include <common.h> +#include <command.h> +#include <linux/stringify.h> +#include <asm/global_data.h> +#include <asm/cache.h> +#include <asm/string.h> +#include <asm/misc.h> + +DECLARE_GLOBAL_DATA_PTR; + +gd_t *gd __attribute__((section(".data"))); + +#if defined(CONFIG_DISPLAY_CPUINFO) +/* + * Print information about the CPU. + */ + +int print_cpuinfo(void) +{ + char buf[120], mhz[8]; + uint32_t id0, id1; + + asm volatile ("rsr %0, 176\n" + "rsr %1, 208\n" + : "=r"(id0), "=r"(id1)); + + sprintf(buf, "CPU: Xtensa %s (id: %08x:%08x) at %s MHz\n", + XCHAL_CORE_ID, id0, id1, strmhz(mhz, gd->cpu_clk)); + puts(buf); + return 0; +} +#endif + +int arch_cpu_init(void) +{ + gd->ram_size = CONFIG_SYS_SDRAM_SIZE; + return 0; +} |