arm64: tegra132: tegra210: Remove old arm64/stage_entry.S

This patch removes the old arm64/stage_entry.S code that was too
specific to the Tegra SoC boot flow, and replaces it with code that
hides the peculiarities of switching to a different CPU/arch in ramstage
in the Tegra SoC directories.

BRANCH=None
BUG=None
TEST=Built Ryu and Smaug. !!!UNTESTED!!!

Change-Id: Ib3a0448b30ac9c7132581464573efd5e86e03698
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/12078
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 0 insertions, 128 deletions

diff --git a/src/arch/arm64/c_entry.c b/src/arch/arm64/c_entry.c
deleted file mode 100644
index f26ed926b1..0000000000
--- a/src/arch/arm64/c_entry.c
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright 2014 Google Inc.
- *
- * 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; version 2 of the License.
- *
- * 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 <arch/cache.h>
-#include <arch/cpu.h>
-#include <arch/lib_helpers.h>
-#include <arch/mmu.h>
-#include <arch/stages.h>
-#include <gic.h>
-
-#include "cpu-internal.h"
-
-void __attribute__((weak)) arm64_soc_init(void)
-{
-	/* Default weak implementation does nothing. */
-}
-
-static void seed_stack(void)
-{
-	char *stack_begin;
-	uint64_t *slot;
-	int i;
-	int size;
-
-	stack_begin = cpu_get_stack();
-	stack_begin -= CONFIG_STACK_SIZE;
-	slot = (void *)stack_begin;
-
-	/* Pad out 256 bytes for current usage. */
-	size = CONFIG_STACK_SIZE - 256;
-	size /= sizeof(*slot);
-	for (i = 0; i < size; i++)
-		*slot++ = 0xdeadbeefdeadbeefULL;
-}
-
-/* Set up default SCR values. */
-static void el3_init(void)
-{
-	uint32_t scr;
-
-	if (get_current_el() != EL3)
-		return;
-
-	scr = raw_read_scr_el3();
-	/* Default to non-secure EL1 and EL0. */
-	scr &= ~(SCR_NS_MASK);
-	scr |= SCR_NS_ENABLE;
-	/* Disable IRQ, FIQ, and external abort interrupt routing. */
-	scr &= ~(SCR_IRQ_MASK | SCR_FIQ_MASK | SCR_EA_MASK);
-	scr |= SCR_IRQ_DISABLE | SCR_FIQ_DISABLE | SCR_EA_DISABLE;
-	/* Enable HVC */
-	scr &= ~(SCR_HVC_MASK);
-	scr |= SCR_HVC_ENABLE;
-	/* Disable SMC */
-	scr &= ~(SCR_SMC_MASK);
-	scr |= SCR_SMC_DISABLE;
-	/* Disable secure instruction fetches. */
-	scr &= ~(SCR_SIF_MASK);
-	scr |= SCR_SIF_DISABLE;
-	/* All lower exception levels 64-bit by default. */
-	scr &= ~(SCR_RW_MASK);
-	scr |= SCR_LOWER_AARCH64;
-	/* Disable secure EL1 access to secure timer. */
-	scr &= ~(SCR_ST_MASK);
-	scr |= SCR_ST_DISABLE;
-	/* Don't trap on WFE or WFI instructions. */
-	scr &= ~(SCR_TWI_MASK | SCR_TWE_MASK);
-	scr |= SCR_TWI_DISABLE | SCR_TWE_DISABLE;
-	raw_write_scr_el3(scr);
-	isb();
-}
-
-void __attribute__((weak)) arm64_arch_timer_init(void)
-{
-	/* Default weak implementation does nothing. */
-}
-
-static void arm64_init(void)
-{
-	seed_stack();
-
-	/* Set up default SCR values. */
-	el3_init();
-
-	/* Initialize the GIC. */
-	gic_init();
-
-	/*
-	 * Disable coprocessor traps to EL3:
-	 * TCPAC [20] = 0, disable traps for EL2 accesses to CPTR_EL2 or HCPTR
-	 * and EL2/EL1 access to CPACR_EL1.
-	 * TTA [20] = 0, disable traps for trace register access from any EL.
-	 * TFP [10] = 0, disable traps for floating-point instructions from any
-	 * EL.
-	 */
-	raw_write_cptr_el3(CPTR_EL3_TCPAC_DISABLE | CPTR_EL3_TTA_DISABLE |
-			   CPTR_EL3_TFP_DISABLE);
-
-	/*
-	 * Allow FPU accesses:
-	 * FPEN [21:20] = 3, disable traps for floating-point instructions from
-	 * EL0/EL1.
-	 * TTA [28] = 0, disable traps for trace register access from EL0/EL1.
-	 */
-	raw_write_cpacr_el1(CPACR_TRAP_FP_DISABLE | CPACR_TTA_DISABLE);
-
-	/* Arch Timer init: setup cntfrq per CPU */
-	arm64_arch_timer_init();
-
-	arm64_soc_init();
-
-	main();
-}
-
-/* This variable holds entry point for CPU starting up. */
-void (*c_entry)(void) = &arm64_init;