From 660d5f0d495197b4057bc1b3bdd201e500b03f1a Mon Sep 17 00:00:00 2001 From: Alexey Brodkin Date: Sun, 28 Dec 2014 02:42:12 +0300 Subject: arc: move common sources in library "reset.c" and "cpu.c" have no architecture-specific code at all. Others are applicable to either ARC CPU. This change is a preparation to submission of ARCv2 architecture port. Even though ARCv1 and ARCv2 ISAs are not binary compatible most of built-in modules still have the same programming model - AUX registers are mapped in the same addresses and hold the same data (new featues extend existing ones). So only low-level assembly code (start-up, interrupt handlers) is left as CPU(actually ISA)-specific. This significantyl simplifies maintenance of multiple CPUs/ISAs. Signed-off-by: Alexey Brodkin Signed-off-by: Igor Guryanov --- arch/arc/lib/cpu.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 arch/arc/lib/cpu.c (limited to 'arch/arc/lib/cpu.c') diff --git a/arch/arc/lib/cpu.c b/arch/arc/lib/cpu.c new file mode 100644 index 0000000..50634b8 --- /dev/null +++ b/arch/arc/lib/cpu.c @@ -0,0 +1,47 @@ +/* + * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +int arch_cpu_init(void) +{ +#ifdef CONFIG_SYS_ICACHE_OFF + icache_disable(); +#else + icache_enable(); + invalidate_icache_all(); +#endif + + flush_dcache_all(); +#ifdef CONFIG_SYS_DCACHE_OFF + dcache_disable(); +#else + dcache_enable(); +#endif + timer_init(); + +/* In simulation (ISS) "CHIPID" and "ARCNUM" are all "ff" */ + if ((read_aux_reg(ARC_AUX_IDENTITY) & 0xffffff00) == 0xffffff00) + gd->arch.running_on_hw = 0; + else + gd->arch.running_on_hw = 1; + + gd->cpu_clk = CONFIG_SYS_CLK_FREQ; + gd->ram_size = CONFIG_SYS_SDRAM_SIZE; + + return 0; +} + +int arch_early_init_r(void) +{ + gd->bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; + gd->bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE; + return 0; +} -- cgit v1.1