ARM: Rename arch/arm/cpu/arm_cortexa8 to armv7

The purpose of this patch is to prepare for adding the OMAP4 architecture, which is Cortex A9

Cortex A8 and A9 both belong to the armv7 architecture, hence the name change.

The two architectures are similar enough that substantial code can be shared.

Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

1 files changed, 361 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/omap3/lowlevel_init.S b/arch/arm/cpu/armv7/omap3/lowlevel_init.S
new file mode 100644
index 0000000000..73063ec8e6
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap3/lowlevel_init.S
@@ -0,0 +1,361 @@
+/*
+ * Board specific setup info
+ *
+ * (C) Copyright 2008
+ * Texas Instruments, <www.ti.com>
+ *
+ * Initial Code by:
+ * Richard Woodruff <r-woodruff2@ti.com>
+ * Syed Mohammed Khasim <khasim@ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <version.h>
+#include <asm/arch/mem.h>
+#include <asm/arch/clocks_omap3.h>
+
+_TEXT_BASE:
+	.word	TEXT_BASE	/* sdram load addr from config.mk */
+
+#if !defined(CONFIG_SYS_NAND_BOOT) && !defined(CONFIG_SYS_NAND_BOOT)
+/**************************************************************************
+ * cpy_clk_code: relocates clock code into SRAM where its safer to execute
+ * R1 = SRAM destination address.
+ *************************************************************************/
+.global cpy_clk_code
+ cpy_clk_code:
+	/* Copy DPLL code into SRAM */
+	adr	r0, go_to_speed		/* get addr of clock setting code */
+	mov	r2, #384		/* r2 size to copy (div by 32 bytes) */
+	mov	r1, r1			/* r1 <- dest address (passed in) */
+	add	r2, r2, r0		/* r2 <- source end address */
+next2:
+	ldmia	r0!, {r3 - r10}		/* copy from source address [r0] */
+	stmia	r1!, {r3 - r10}		/* copy to   target address [r1] */
+	cmp	r0, r2			/* until source end address [r2] */
+	bne	next2
+	mov	pc, lr			/* back to caller */
+
+/* ***************************************************************************
+ *  go_to_speed: -Moves to bypass, -Commits clock dividers, -puts dpll at speed
+ *               -executed from SRAM.
+ *  R0 = CM_CLKEN_PLL-bypass value
+ *  R1 = CM_CLKSEL1_PLL-m, n, and divider values
+ *  R2 = CM_CLKSEL_CORE-divider values
+ *  R3 = CM_IDLEST_CKGEN - addr dpll lock wait
+ *
+ *  Note: If core unlocks/relocks and SDRAM is running fast already it gets
+ *        confused.  A reset of the controller gets it back.  Taking away its
+ *        L3 when its not in self refresh seems bad for it.  Normally, this
+ *	  code runs from flash before SDR is init so that should be ok.
+ ****************************************************************************/
+.global go_to_speed
+ go_to_speed:
+	stmfd sp!, {r4 - r6}
+
+	/* move into fast relock bypass */
+	ldr	r4, pll_ctl_add
+	str	r0, [r4]
+wait1:
+	ldr	r5, [r3]		/* get status */
+	and	r5, r5, #0x1		/* isolate core status */
+	cmp	r5, #0x1		/* still locked? */
+	beq	wait1			/* if lock, loop */
+
+	/* set new dpll dividers _after_ in bypass */
+	ldr	r5, pll_div_add1
+	str	r1, [r5]		/* set m, n, m2 */
+	ldr	r5, pll_div_add2
+	str	r2, [r5]		/* set l3/l4/.. dividers*/
+	ldr	r5, pll_div_add3	/* wkup */
+	ldr	r2, pll_div_val3	/* rsm val */
+	str	r2, [r5]
+	ldr	r5, pll_div_add4	/* gfx */
+	ldr	r2, pll_div_val4
+	str	r2, [r5]
+	ldr	r5, pll_div_add5	/* emu */
+	ldr	r2, pll_div_val5
+	str	r2, [r5]
+
+	/* now prepare GPMC (flash) for new dpll speed */
+	/* flash needs to be stable when we jump back to it */
+	ldr	r5, flash_cfg3_addr
+	ldr	r2, flash_cfg3_val
+	str	r2, [r5]
+	ldr	r5, flash_cfg4_addr
+	ldr	r2, flash_cfg4_val
+	str	r2, [r5]
+	ldr	r5, flash_cfg5_addr
+	ldr	r2, flash_cfg5_val
+	str	r2, [r5]
+	ldr	r5, flash_cfg1_addr
+	ldr	r2, [r5]
+	orr	r2, r2, #0x3		/* up gpmc divider */
+	str	r2, [r5]
+
+	/* lock DPLL3 and wait a bit */
+	orr	r0, r0, #0x7	/* set up for lock mode */
+	str	r0, [r4]	/* lock */
+	nop			/* ARM slow at this point working at sys_clk */
+	nop
+	nop
+	nop
+wait2:
+	ldr	r5, [r3]	/* get status */
+	and	r5, r5, #0x1	/* isolate core status */
+	cmp	r5, #0x1	/* still locked? */
+	bne	wait2		/* if lock, loop */
+	nop
+	nop
+	nop
+	nop
+	ldmfd	sp!, {r4 - r6}
+	mov	pc, lr		/* back to caller, locked */
+
+_go_to_speed: .word go_to_speed
+
+/* these constants need to be close for PIC code */
+/* The Nor has to be in the Flash Base CS0 for this condition to happen */
+flash_cfg1_addr:
+	.word (GPMC_CONFIG_CS0_BASE + GPMC_CONFIG1)
+flash_cfg3_addr:
+	.word (GPMC_CONFIG_CS0_BASE + GPMC_CONFIG3)
+flash_cfg3_val:
+	.word STNOR_GPMC_CONFIG3
+flash_cfg4_addr:
+	.word (GPMC_CONFIG_CS0_BASE + GPMC_CONFIG4)
+flash_cfg4_val:
+	.word STNOR_GPMC_CONFIG4
+flash_cfg5_val:
+	.word STNOR_GPMC_CONFIG5
+flash_cfg5_addr:
+	.word (GPMC_CONFIG_CS0_BASE + GPMC_CONFIG5)
+pll_ctl_add:
+	.word CM_CLKEN_PLL
+pll_div_add1:
+	.word CM_CLKSEL1_PLL
+pll_div_add2:
+	.word CM_CLKSEL_CORE
+pll_div_add3:
+	.word CM_CLKSEL_WKUP
+pll_div_val3:
+	.word (WKUP_RSM << 1)
+pll_div_add4:
+	.word CM_CLKSEL_GFX
+pll_div_val4:
+	.word (GFX_DIV << 0)
+pll_div_add5:
+	.word CM_CLKSEL1_EMU
+pll_div_val5:
+	.word CLSEL1_EMU_VAL
+
+#endif
+
+.globl lowlevel_init
+lowlevel_init:
+	ldr	sp, SRAM_STACK
+	str	ip, [sp]	/* stash old link register */
+	mov	ip, lr		/* save link reg across call */
+	bl	s_init		/* go setup pll, mux, memory */
+	ldr	ip, [sp]	/* restore save ip */
+	mov	lr, ip		/* restore link reg */
+
+	/* back to arch calling code */
+	mov	pc, lr
+
+	/* the literal pools origin */
+	.ltorg
+
+REG_CONTROL_STATUS:
+	.word CONTROL_STATUS
+SRAM_STACK:
+	.word LOW_LEVEL_SRAM_STACK
+
+/* DPLL(1-4) PARAM TABLES */
+
+/*
+ * Each of the tables has M, N, FREQSEL, M2 values defined for nominal
+ * OPP (1.2V). The fields are defined according to dpll_param struct (clock.c).
+ * The values are defined for all possible sysclk and for ES1 and ES2.
+ */
+
+mpu_dpll_param:
+/* 12MHz */
+/* ES1 */
+.word MPU_M_12_ES1, MPU_N_12_ES1, MPU_FSEL_12_ES1, MPU_M2_12_ES1
+/* ES2 */
+.word MPU_M_12_ES2, MPU_N_12_ES2, MPU_FSEL_12_ES2, MPU_M2_ES2
+/* 3410 */
+.word MPU_M_12, MPU_N_12, MPU_FSEL_12, MPU_M2_12
+
+/* 13MHz */
+/* ES1 */
+.word MPU_M_13_ES1, MPU_N_13_ES1, MPU_FSEL_13_ES1, MPU_M2_13_ES1
+/* ES2 */
+.word MPU_M_13_ES2, MPU_N_13_ES2, MPU_FSEL_13_ES2, MPU_M2_13_ES2
+/* 3410 */
+.word MPU_M_13, MPU_N_13, MPU_FSEL_13, MPU_M2_13
+
+/* 19.2MHz */
+/* ES1 */
+.word MPU_M_19P2_ES1, MPU_N_19P2_ES1, MPU_FSEL_19P2_ES1, MPU_M2_19P2_ES1
+/* ES2 */
+.word MPU_M_19P2_ES2, MPU_N_19P2_ES2, MPU_FSEL_19P2_ES2, MPU_M2_19P2_ES2
+/* 3410 */
+.word MPU_M_19P2, MPU_N_19P2, MPU_FSEL_19P2, MPU_M2_19P2
+
+/* 26MHz */
+/* ES1 */
+.word MPU_M_26_ES1, MPU_N_26_ES1, MPU_FSEL_26_ES1, MPU_M2_26_ES1
+/* ES2 */
+.word MPU_M_26_ES2, MPU_N_26_ES2, MPU_FSEL_26_ES2, MPU_M2_26_ES2
+/* 3410 */
+.word MPU_M_26, MPU_N_26, MPU_FSEL_26, MPU_M2_26
+
+/* 38.4MHz */
+/* ES1 */
+.word MPU_M_38P4_ES1, MPU_N_38P4_ES1, MPU_FSEL_38P4_ES1, MPU_M2_38P4_ES1
+/* ES2 */
+.word MPU_M_38P4_ES2, MPU_N_38P4_ES2, MPU_FSEL_38P4_ES2, MPU_M2_38P4_ES2
+/* 3410 */
+.word MPU_M_38P4, MPU_N_38P4, MPU_FSEL_38P4, MPU_M2_38P4
+
+
+.globl get_mpu_dpll_param
+get_mpu_dpll_param:
+	adr	r0, mpu_dpll_param
+	mov	pc, lr
+
+iva_dpll_param:
+/* 12MHz */
+/* ES1 */
+.word IVA_M_12_ES1, IVA_N_12_ES1, IVA_FSEL_12_ES1, IVA_M2_12_ES1
+/* ES2 */
+.word IVA_M_12_ES2, IVA_N_12_ES2, IVA_FSEL_12_ES2, IVA_M2_12_ES2
+/* 3410 */
+.word IVA_M_12, IVA_N_12, IVA_FSEL_12, IVA_M2_12
+
+/* 13MHz */
+/* ES1 */
+.word IVA_M_13_ES1, IVA_N_13_ES1, IVA_FSEL_13_ES1, IVA_M2_13_ES1
+/* ES2 */
+.word IVA_M_13_ES2, IVA_N_13_ES2,  IVA_FSEL_13_ES2, IVA_M2_13_ES2
+/* 3410 */
+.word IVA_M_13, IVA_N_13, IVA_FSEL_13, IVA_M2_13
+
+/* 19.2MHz */
+/* ES1 */
+.word IVA_M_19P2_ES1, IVA_N_19P2_ES1, IVA_FSEL_19P2_ES1, IVA_M2_19P2_ES1
+/* ES2 */
+.word IVA_M_19P2_ES2, IVA_N_19P2_ES2, IVA_FSEL_19P2_ES2, IVA_M2_19P2_ES2
+/* 3410 */
+.word IVA_M_19P2, IVA_N_19P2, IVA_FSEL_19P2, IVA_M2_19P2
+
+/* 26MHz */
+/* ES1 */
+.word IVA_M_26_ES1, IVA_N_26_ES1, IVA_FSEL_26_ES1, IVA_M2_26_ES1
+/* ES2 */
+.word IVA_M_26_ES2, IVA_N_26_ES2, IVA_FSEL_26_ES2, IVA_M2_26_ES2
+/* 3410 */
+.word IVA_M_26, IVA_N_26, IVA_FSEL_26, IVA_M2_26
+
+/* 38.4MHz */
+/* ES1 */
+.word IVA_M_38P4_ES1, IVA_N_38P4_ES1, IVA_FSEL_38P4_ES1, IVA_M2_38P4_ES1
+/* ES2 */
+.word IVA_M_38P4_ES2, IVA_N_38P4_ES2, IVA_FSEL_38P4_ES2, IVA_M2_38P4_ES2
+/* 3410 */
+.word IVA_M_38P4, IVA_N_38P4, IVA_FSEL_38P4, IVA_M2_38P4
+
+
+.globl get_iva_dpll_param
+get_iva_dpll_param:
+	adr	r0, iva_dpll_param
+	mov	pc, lr
+
+/* Core DPLL targets for L3 at 166 & L133 */
+core_dpll_param:
+/* 12MHz */
+/* ES1 */
+.word CORE_M_12_ES1, CORE_N_12_ES1, CORE_FSL_12_ES1, CORE_M2_12_ES1
+/* ES2 */
+.word CORE_M_12, CORE_N_12, CORE_FSEL_12, CORE_M2_12
+/* 3410 */
+.word CORE_M_12, CORE_N_12, CORE_FSEL_12, CORE_M2_12
+
+/* 13MHz */
+/* ES1 */
+.word CORE_M_13_ES1, CORE_N_13_ES1, CORE_FSL_13_ES1, CORE_M2_13_ES1
+/* ES2 */
+.word CORE_M_13, CORE_N_13, CORE_FSEL_13, CORE_M2_13
+/* 3410 */
+.word CORE_M_13, CORE_N_13, CORE_FSEL_13, CORE_M2_13
+
+/* 19.2MHz */
+/* ES1 */
+.word CORE_M_19P2_ES1, CORE_N_19P2_ES1, CORE_FSL_19P2_ES1, CORE_M2_19P2_ES1
+/* ES2 */
+.word CORE_M_19P2, CORE_N_19P2, CORE_FSEL_19P2, CORE_M2_19P2
+/* 3410 */
+.word CORE_M_19P2, CORE_N_19P2, CORE_FSEL_19P2, CORE_M2_19P2
+
+/* 26MHz */
+/* ES1 */
+.word CORE_M_26_ES1, CORE_N_26_ES1, CORE_FSL_26_ES1, CORE_M2_26_ES1
+/* ES2 */
+.word CORE_M_26, CORE_N_26, CORE_FSEL_26, CORE_M2_26
+/* 3410 */
+.word CORE_M_26, CORE_N_26, CORE_FSEL_26, CORE_M2_26
+
+/* 38.4MHz */
+/* ES1 */
+.word CORE_M_38P4_ES1, CORE_N_38P4_ES1, CORE_FSL_38P4_ES1, CORE_M2_38P4_ES1
+/* ES2 */
+.word CORE_M_38P4, CORE_N_38P4, CORE_FSEL_38P4, CORE_M2_38P4
+/* 3410 */
+.word CORE_M_38P4, CORE_N_38P4, CORE_FSEL_38P4, CORE_M2_38P4
+
+.globl get_core_dpll_param
+get_core_dpll_param:
+	adr	r0, core_dpll_param
+	mov	pc, lr
+
+/* PER DPLL values are same for both ES1 and ES2 */
+per_dpll_param:
+/* 12MHz */
+.word PER_M_12, PER_N_12, PER_FSEL_12, PER_M2_12
+
+/* 13MHz */
+.word PER_M_13, PER_N_13, PER_FSEL_13, PER_M2_13
+
+/* 19.2MHz */
+.word PER_M_19P2, PER_N_19P2, PER_FSEL_19P2, PER_M2_19P2
+
+/* 26MHz */
+.word PER_M_26, PER_N_26, PER_FSEL_26, PER_M2_26
+
+/* 38.4MHz */
+.word PER_M_38P4, PER_N_38P4, PER_FSEL_38P4, PER_M2_38P4
+
+.globl get_per_dpll_param
+get_per_dpll_param:
+	adr	r0, per_dpll_param
+	mov	pc, lr