1 files changed, 274 insertions, 0 deletions
diff --git a/lib/arch/aarch64/misc_helpers.S b/lib/arch/aarch64/misc_helpers.S
new file mode 100644
index 00000000..8c1f7400
--- /dev/null
+++ b/lib/arch/aarch64/misc_helpers.S
@@ -0,0 +1,274 @@
+/*
+ * Copyright (c) 2013, ARM Limited. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <arch_helpers.h>
+
+	.globl	enable_irq
+	.globl	disable_irq
+
+	.globl	enable_fiq
+	.globl	disable_fiq
+
+	.globl	enable_serror
+	.globl	disable_serror
+
+	.globl	read_daif
+	.globl	write_daif
+
+	.globl	read_spsr
+	.globl	read_spsr_el1
+	.globl	read_spsr_el2
+	.globl	read_spsr_el3
+
+	.globl	write_spsr
+	.globl	write_spsr_el1
+	.globl	write_spsr_el2
+	.globl	write_spsr_el3
+
+	.globl	read_elr
+	.globl	read_elr_el1
+	.globl	read_elr_el2
+	.globl	read_elr_el3
+
+	.globl	write_elr
+	.globl	write_elr_el1
+	.globl	write_elr_el2
+	.globl	write_elr_el3
+
+	.globl	get_afflvl_shift
+	.globl	mpidr_mask_lower_afflvls
+	.globl	dsb
+	.globl	isb
+	.globl	sev
+	.globl	wfe
+	.globl	wfi
+	.globl	eret
+	.globl	smc
+
+
+	.section	.text, "ax"
+
+get_afflvl_shift:; .type get_afflvl_shift, %function
+	cmp	x0, #3
+	cinc	x0, x0, eq
+	mov	x1, #MPIDR_AFFLVL_SHIFT
+	lsl	x0, x0, x1
+	ret
+
+mpidr_mask_lower_afflvls:; .type mpidr_mask_lower_afflvls, %function
+	cmp	x1, #3
+	cinc	x1, x1, eq
+	mov	x2, #MPIDR_AFFLVL_SHIFT
+	lsl	x2, x1, x2
+	lsr	x0, x0, x2
+	lsl	x0, x0, x2
+	ret
+
+	/* -----------------------------------------------------
+	 * Asynchronous exception manipulation accessors
+	 * -----------------------------------------------------
+	 */
+enable_irq:; .type enable_irq, %function
+	msr	daifclr, #DAIF_IRQ_BIT
+	ret
+
+
+enable_fiq:; .type enable_fiq, %function
+	msr	daifclr, #DAIF_FIQ_BIT
+	ret
+
+
+enable_serror:; .type enable_serror, %function
+	msr	daifclr, #DAIF_ABT_BIT
+	ret
+
+
+disable_irq:; .type disable_irq, %function
+	msr	daifset, #DAIF_IRQ_BIT
+	ret
+
+
+disable_fiq:; .type disable_fiq, %function
+	msr	daifset, #DAIF_FIQ_BIT
+	ret
+
+
+disable_serror:; .type disable_serror, %function
+	msr	daifset, #DAIF_ABT_BIT
+	ret
+
+
+read_daif:; .type read_daif, %function
+	mrs	x0, daif
+	ret
+
+
+write_daif:; .type write_daif, %function
+	msr	daif, x0
+	ret
+
+
+read_spsr:; .type read_spsr, %function
+	mrs	x0, CurrentEl
+	cmp	x0, #(MODE_EL1 << MODE_EL_SHIFT)
+	b.eq	read_spsr_el1
+	cmp	x0, #(MODE_EL2 << MODE_EL_SHIFT)
+	b.eq	read_spsr_el2
+	cmp	x0, #(MODE_EL3 << MODE_EL_SHIFT)
+	b.eq	read_spsr_el3
+
+
+read_spsr_el1:; .type read_spsr_el1, %function
+	mrs	x0, spsr_el1
+	ret
+
+
+read_spsr_el2:; .type read_spsr_el2, %function
+	mrs	x0, spsr_el2
+	ret
+
+
+read_spsr_el3:; .type read_spsr_el3, %function
+	mrs	x0, spsr_el3
+	ret
+
+
+write_spsr:; .type write_spsr, %function
+	mrs	x1, CurrentEl
+	cmp	x1, #(MODE_EL1 << MODE_EL_SHIFT)
+	b.eq	write_spsr_el1
+	cmp	x1, #(MODE_EL2 << MODE_EL_SHIFT)
+	b.eq	write_spsr_el2
+	cmp	x1, #(MODE_EL3 << MODE_EL_SHIFT)
+	b.eq	write_spsr_el3
+
+
+write_spsr_el1:; .type write_spsr_el1, %function
+	msr	spsr_el1, x0
+	isb
+	ret
+
+
+write_spsr_el2:; .type write_spsr_el2, %function
+	msr	spsr_el2, x0
+	isb
+	ret
+
+
+write_spsr_el3:; .type write_spsr_el3, %function
+	msr	spsr_el3, x0
+	isb
+	ret
+
+
+read_elr:; .type read_elr, %function
+	mrs	x0, CurrentEl
+	cmp	x0, #(MODE_EL1 << MODE_EL_SHIFT)
+	b.eq	read_elr_el1
+	cmp	x0, #(MODE_EL2 << MODE_EL_SHIFT)
+	b.eq	read_elr_el2
+	cmp	x0, #(MODE_EL3 << MODE_EL_SHIFT)
+	b.eq	read_elr_el3
+
+
+read_elr_el1:; .type read_elr_el1, %function
+	mrs	x0, elr_el1
+	ret
+
+
+read_elr_el2:; .type read_elr_el2, %function
+	mrs	x0, elr_el2
+	ret
+
+
+read_elr_el3:; .type read_elr_el3, %function
+	mrs	x0, elr_el3
+	ret
+
+
+write_elr:; .type write_elr, %function
+	mrs	x1, CurrentEl
+	cmp	x1, #(MODE_EL1 << MODE_EL_SHIFT)
+	b.eq	write_elr_el1
+	cmp	x1, #(MODE_EL2 << MODE_EL_SHIFT)
+	b.eq	write_elr_el2
+	cmp	x1, #(MODE_EL3 << MODE_EL_SHIFT)
+	b.eq	write_elr_el3
+
+
+write_elr_el1:; .type write_elr_el1, %function
+	msr	elr_el1, x0
+	isb
+	ret
+
+
+write_elr_el2:; .type write_elr_el2, %function
+	msr	elr_el2, x0
+	isb
+	ret
+
+
+write_elr_el3:; .type write_elr_el3, %function
+	msr	elr_el3, x0
+	isb
+	ret
+
+
+dsb:; .type dsb, %function
+	dsb	sy
+	ret
+
+
+isb:; .type isb, %function
+	isb
+	ret
+
+
+sev:; .type sev, %function
+	sev
+	ret
+
+
+wfe:; .type wfe, %function
+	wfe
+	ret
+
+
+wfi:; .type wfi, %function
+	wfi
+	ret
+
+
+eret:; .type eret, %function
+	eret
+
+
+smc:; .type smc, %function
+	smc	#0