diff options
Diffstat (limited to 'arch/arm/cpu/armv7')
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/Makefile | 44 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/lowlevel_init.S | 72 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/sys_info.c | 130 |
3 files changed, 246 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/am33xx/Makefile b/arch/arm/cpu/armv7/am33xx/Makefile new file mode 100644 index 0000000..498df78 --- /dev/null +++ b/arch/arm/cpu/armv7/am33xx/Makefile @@ -0,0 +1,44 @@ +# +# Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/ +# +# 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; either version 2 of +# the License, or (at your option) any later version. +# +# This program is distributed "as is" WITHOUT ANY WARRANTY of any +# kind, whether express or implied; without even the implied warranty +# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# + +include $(TOPDIR)/config.mk + +LIB = $(obj)lib$(SOC).o + +SOBJS := lowlevel_init.o + +COBJS += sys_info.o + +SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) +OBJS := $(addprefix $(obj),$(COBJS) $(COBJS-y) $(SOBJS)) + +all: $(obj).depend $(LIB) + +$(LIB): $(OBJS) + $(call cmd_link_o_target, $(OBJS)) + +clean: + rm -f $(SOBJS) $(OBJS) + +distclean: clean + rm -f $(LIB) core *.bak .depend + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### diff --git a/arch/arm/cpu/armv7/am33xx/lowlevel_init.S b/arch/arm/cpu/armv7/am33xx/lowlevel_init.S new file mode 100644 index 0000000..17c962f --- /dev/null +++ b/arch/arm/cpu/armv7/am33xx/lowlevel_init.S @@ -0,0 +1,72 @@ +/* + * lowlevel_init.S + * + * AM33XX low level initialization. + * + * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/ + * + * Initial Code by: + * Mansoor Ahamed <mansoor.ahamed@ti.com> + * + * 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; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <config.h> +#include <asm/arch/hardware.h> + +_mark1: + .word mark1 +_lowlevel_init1: + .word lowlevel_init +_s_init_start: + .word s_init_start + +_TEXT_BASE: + .word CONFIG_SYS_TEXT_BASE /* sdram load addr from config.mk */ + +/***************************************************************************** + * lowlevel_init: - Platform low level init. + ****************************************************************************/ +.globl lowlevel_init +lowlevel_init: + + /* The link register is saved in ip by start.S */ + mov r6, ip + /* check if we are already running from RAM */ + ldr r2, _lowlevel_init1 + ldr r3, _TEXT_BASE + sub r4, r2, r3 + sub r0, pc, r4 + ldr sp, SRAM_STACK +mark1: + ldr r5, _mark1 + sub r5, r5, r2 /* bytes between mark1 and lowlevel_init */ + sub r0, r0, r5 /* r0 <- _start w.r.t current place of execution */ + mov r10, #0x0 /* r10 has in_ddr used by s_init() */ + + ands r0, r0, #0xC0000000 + /* MSB 2 bits <> 0 then we are in ocmc or DDR */ + cmp r0, #0x80000000 + bne s_init_start + mov r10, #0x01 + b s_init_start + +s_init_start: + mov r0, r10 /* passing in_ddr in r0 */ + bl s_init + /* back to arch calling code */ + mov pc, r6 + /* the literal pools origin */ + .ltorg + +SRAM_STACK: + /* Place stack at the top */ + .word LOW_LEVEL_SRAM_STACK diff --git a/arch/arm/cpu/armv7/am33xx/sys_info.c b/arch/arm/cpu/armv7/am33xx/sys_info.c new file mode 100644 index 0000000..507b618 --- /dev/null +++ b/arch/arm/cpu/armv7/am33xx/sys_info.c @@ -0,0 +1,130 @@ +/* + * sys_info.c + * + * System information functions + * + * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/ + * + * Derived from Beagle Board and 3430 SDP code by + * Richard Woodruff <r-woodruff2@ti.com> + * Syed Mohammed Khasim <khasim@ti.com> + * + * 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; either version 2 of + * the License, or (at your option) any later version. + * + * 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. + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/sys_proto.h> +#include <asm/arch/cpu.h> +#include <asm/arch/clock.h> + +struct ctrl_stat *cstat = (struct ctrl_stat *)CTRL_BASE; + +/** + * get_cpu_rev(void) - extract rev info + */ +u32 get_cpu_rev(void) +{ + u32 id; + u32 rev; + + id = readl(DEVICE_ID); + rev = (id >> 28) & 0xff; + + return rev; +} + +/** + * get_cpu_type(void) - extract cpu info + */ +u32 get_cpu_type(void) +{ + u32 id = 0; + u32 partnum; + + id = readl(DEVICE_ID); + partnum = (id >> 12) & 0xffff; + + return partnum; +} + +/** + * get_board_rev() - setup to pass kernel board revision information + * returns:(bit[0-3] sub version, higher bit[7-4] is higher version) + */ +u32 get_board_rev(void) +{ + return BOARD_REV_ID; +} + +/** + * get_device_type(): tell if GP/HS/EMU/TST + */ +u32 get_device_type(void) +{ + int mode; + mode = readl(&cstat->statusreg) & (DEVICE_MASK); + return mode >>= 8; +} + +/** + * get_sysboot_value(void) - return SYS_BOOT[4:0] + */ +u32 get_sysboot_value(void) +{ + int mode; + mode = readl(&cstat->statusreg) & (SYSBOOT_MASK); + return mode; +} + +#ifdef CONFIG_DISPLAY_CPUINFO +/** + * Print CPU information + */ +int print_cpuinfo(void) +{ + char *cpu_s, *sec_s; + int arm_freq, ddr_freq; + + switch (get_cpu_type()) { + case AM335X: + cpu_s = "AM335X"; + break; + default: + cpu_s = "Unknown cpu type"; + break; + } + + switch (get_device_type()) { + case TST_DEVICE: + sec_s = "TST"; + break; + case EMU_DEVICE: + sec_s = "EMU"; + break; + case HS_DEVICE: + sec_s = "HS"; + break; + case GP_DEVICE: + sec_s = "GP"; + break; + default: + sec_s = "?"; + } + + printf("AM%s-%s rev %d\n", + cpu_s, sec_s, get_cpu_rev()); + + /* TODO: Print ARM and DDR frequencies */ + + return 0; +} +#endif /* CONFIG_DISPLAY_CPUINFO */ |