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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (C) Copyright 2010
- * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
- * (C) Copyright 2009
- * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
- * (C) Copyright 2013
- * Bo Shen <voice.shen@atmel.com>
- */
- #include <common.h>
- #include <cpu_func.h>
- #include <init.h>
- #include <vsprintf.h>
- #include <asm/io.h>
- #include <asm/arch/hardware.h>
- #include <asm/arch/at91_pit.h>
- #include <asm/arch/at91_gpbr.h>
- #include <asm/arch/clk.h>
- #ifndef CONFIG_SYS_AT91_MAIN_CLOCK
- #define CONFIG_SYS_AT91_MAIN_CLOCK 0
- #endif
- int arch_cpu_init(void)
- {
- return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
- }
- void arch_preboot_os(void)
- {
- ulong cpiv;
- at91_pit_t *pit = (at91_pit_t *)ATMEL_BASE_PIT;
- cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
- /*
- * Disable PITC
- * Add 0x1000 to current counter to stop it faster
- * without waiting for wrapping back to 0
- */
- writel(cpiv + 0x1000, &pit->mr);
- }
- #if defined(CONFIG_DISPLAY_CPUINFO)
- int print_cpuinfo(void)
- {
- char buf[32];
- printf("CPU: %s\n", get_cpu_name());
- printf("Crystal frequency: %8s MHz\n",
- strmhz(buf, get_main_clk_rate()));
- printf("CPU clock : %8s MHz\n",
- strmhz(buf, get_cpu_clk_rate()));
- printf("Master clock : %8s MHz\n",
- strmhz(buf, get_mck_clk_rate()));
- return 0;
- }
- #endif
- void enable_caches(void)
- {
- icache_enable();
- dcache_enable();
- }
- #define ATMEL_CHIPID_CIDR_VERSION 0x1f
- unsigned int get_chip_id(void)
- {
- return readl(ATMEL_CHIPID_CIDR) & ~ATMEL_CHIPID_CIDR_VERSION;
- }
- unsigned int get_extension_chip_id(void)
- {
- return readl(ATMEL_CHIPID_EXID);
- }
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