tegra2: Remove unneeded boot code

Since we have cache support built in we can remove Tegra's existing cache
initialization code amd other related dead code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/cpu/armv7/start.S

@@ -82,18 +82,6 @@ _end_vect:
 _TEXT_BASE:
 	.word	CONFIG_SYS_TEXT_BASE
 
-#ifdef CONFIG_TEGRA2
-/*
- * Tegra2 uses 2 separate CPUs - the AVP (ARM7TDMI) and the CPU (dual A9s).
- * U-Boot runs on the AVP first, setting things up for the CPU (PLLs,
- * muxes, clocks, clamps, etc.). Then the AVP halts, and expects the CPU
- * to pick up its reset vector, which points here.
- */
-.globl _armboot_start
-_armboot_start:
-	.word _start
-#endif
-
 /*
  * These are defined in the board-specific linker script.
  */

arch/arm/cpu/armv7/tegra2/ap20.h

@@ -95,13 +95,8 @@
 #define HALT_COP_EVENT_IRQ_1		(1 << 11)
 #define HALT_COP_EVENT_FIQ_1		(1 << 9)
 
-/* Prototypes */
-
+/* Start up the tegra2 SOC */
 void tegra2_start(void);
-void uart_init(void);
-void udelay(unsigned long);
-void cold_boot(void);
-void cache_configure(void);
 
 /* This is the main entry into U-Boot, used by the Cortex-A9 */
 extern void _start(void);

arch/arm/cpu/armv7/tegra2/board.c

@@ -55,14 +55,6 @@ unsigned int query_sdram_size(void)
 	}
 }
 
-void s_init(void)
-{
-#ifndef CONFIG_ICACHE_OFF
-	icache_enable();
-#endif
-	invalidate_dcache();
-}
-
 int dram_init(void)
 {
 	unsigned long rs;

arch/arm/cpu/armv7/tegra2/config.mk

@@ -24,9 +24,6 @@
 # MA 02111-1307 USA
 #
 
-# Use ARMv4 for Tegra2 - initial code runs on the AVP, which is an ARM7TDI.
-PLATFORM_CPPFLAGS += -march=armv4
-
 # Tegra has an ARMv4T CPU which runs board_init_f(), so we must build this
 # file with compatible flags
 ifdef CONFIG_TEGRA2

arch/arm/cpu/armv7/tegra2/lowlevel_init.S

@@ -26,14 +26,6 @@
 #include <config.h>
 #include <version.h>
 
-
-_TEXT_BASE:
-	.word	CONFIG_SYS_TEXT_BASE	@ sdram load addr from config file
-
-.global invalidate_dcache
-invalidate_dcache:
-	mov pc, lr
-
 	.align	5
 .global reset_cpu
 reset_cpu:
@@ -47,113 +39,3 @@ _loop_forever:
 	b	_loop_forever
 rstctl:
 	.word	PRM_RSTCTRL
-
-.globl lowlevel_init
-lowlevel_init:
-	ldr	sp, SRAM_STACK
-	str	ip, [sp]
-	mov	ip, lr
-	bl	s_init				@ go setup pll, mux & memory
-	ldr	ip, [sp]
-	mov	lr, ip
-
-	mov	pc, lr				@ back to arch calling code
-
-
-.globl startup_cpu
-startup_cpu:
-	@ Initialize the AVP, clocks, and memory controller
-	@ SDRAM is guaranteed to be on at this point
-
-	ldr     r0, =cold_boot			@ R0 = reset vector for CPU
-	bl      start_cpu			@ start the CPU
-
-	@ Transfer control to the AVP code
-	bl      halt_avp
-
-	@ Should never get here
-_loop_forever2:
-	b	_loop_forever2
-
-.globl cache_configure
-cache_configure:
-	stmdb	r13!,{r14}
-	@ invalidate instruction cache
-	mov	r1, #0
-	mcr	p15, 0, r1, c7, c5, 0
-
-	@ invalidate the i&d tlb entries
-	mcr	p15, 0, r1, c8, c5, 0
-	mcr	p15, 0, r1, c8, c6, 0
-
-	@ enable instruction cache
-	mrc	p15, 0, r1, c1, c0, 0
-	orr	r1, r1, #(1<<12)
-	mcr	p15, 0, r1, c1, c0, 0
-
-	bl	enable_scu
-
-	@ enable SMP mode and FW for CPU0, by writing to Auxiliary Ctl reg
-	mrc	p15, 0, r0, c1, c0, 1
-	orr	r0, r0, #0x41
-	mcr	p15, 0, r0, c1, c0, 1
-
-	@ Now flush the Dcache
-	mov	r0, #0
-	@ 256 cache lines
-	mov	r1, #256
-
-invalidate_loop:
-	add	r1, r1, #-1
-	mov	r0, r1, lsl #5
-	@ invalidate d-cache using line (way0)
-	mcr	p15, 0, r0, c7, c6, 2
-
-	orr	r2, r0, #(1<<30)
-	@ invalidate d-cache using line (way1)
-	mcr	p15, 0, r2, c7, c6, 2
-
-	orr	r2, r0, #(2<<30)
-	@ invalidate d-cache using line (way2)
-	mcr	p15, 0, r2, c7, c6, 2
-
-	orr	r2, r0, #(3<<30)
-	@ invalidate d-cache using line (way3)
-	mcr	p15, 0, r2, c7, c6, 2
-	cmp	r1, #0
-	bne	invalidate_loop
-
-	@ FIXME: should have ap20's L2 disabled too?
-invalidate_done:
-	ldmia	r13!,{pc}
-
-.globl cold_boot
-cold_boot:
-	msr	cpsr_c, #0xD3
-	@ Check current processor: CPU or AVP?
-	@  If CPU, go to CPU boot code, else continue on AVP path
-
-	ldr	r0, =NV_PA_PG_UP_BASE
-	ldr	r1, [r0]
-	ldr	r2, =PG_UP_TAG_AVP
-
-	@ are we the CPU?
-	ldr	sp, CPU_STACK
-	cmp	r1, r2
-	@ yep, we are the CPU
-	bne	_armboot_start
-
-	@ AVP initialization follows this path
-	ldr	sp, AVP_STACK
-	@ Init AVP and start CPU
-	b	startup_cpu
-
-	@ the literal pools origin
-	.ltorg
-
-SRAM_STACK:
-	.word LOW_LEVEL_SRAM_STACK
-AVP_STACK:
-	.word EARLY_AVP_STACK
-CPU_STACK:
-	.word EARLY_CPU_STACK