Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 192 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/arch/arm/cpu/armv7/nonsec_virt.S b/qemu/roms/u-boot/arch/arm/cpu/armv7/nonsec_virt.S
new file mode 100644
index 000000000..6367e0961
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/armv7/nonsec_virt.S
@@ -0,0 +1,192 @@
+/*
+ * code for switching cores into non-secure state and into HYP mode
+ *
+ * Copyright (c) 2013	Andre Przywara <andre.przywara@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <linux/linkage.h>
+#include <asm/gic.h>
+#include <asm/armv7.h>
+
+.arch_extension sec
+.arch_extension virt
+
+	.align	5
+/* the vector table for secure state and HYP mode */
+_monitor_vectors:
+	.word 0	/* reset */
+	.word 0 /* undef */
+	adr pc, _secure_monitor
+	.word 0
+	.word 0
+	adr pc, _hyp_trap
+	.word 0
+	.word 0
+
+/*
+ * secure monitor handler
+ * U-boot calls this "software interrupt" in start.S
+ * This is executed on a "smc" instruction, we use a "smc #0" to switch
+ * to non-secure state.
+ * We use only r0 and r1 here, due to constraints in the caller.
+ */
+_secure_monitor:
+	mrc	p15, 0, r1, c1, c1, 0		@ read SCR
+	bic	r1, r1, #0x4e			@ clear IRQ, FIQ, EA, nET bits
+	orr	r1, r1, #0x31			@ enable NS, AW, FW bits
+
+#ifdef CONFIG_ARMV7_VIRT
+	mrc	p15, 0, r0, c0, c1, 1		@ read ID_PFR1
+	and	r0, r0, #CPUID_ARM_VIRT_MASK	@ mask virtualization bits
+	cmp	r0, #(1 << CPUID_ARM_VIRT_SHIFT)
+	orreq	r1, r1, #0x100			@ allow HVC instruction
+#endif
+
+	mcr	p15, 0, r1, c1, c1, 0		@ write SCR (with NS bit set)
+
+#ifdef CONFIG_ARMV7_VIRT
+	mrceq	p15, 0, r0, c12, c0, 1		@ get MVBAR value
+	mcreq	p15, 4, r0, c12, c0, 0		@ write HVBAR
+#endif
+
+	movs	pc, lr				@ return to non-secure SVC
+
+_hyp_trap:
+	mrs	lr, elr_hyp	@ for older asm: .byte 0x00, 0xe3, 0x0e, 0xe1
+	mov pc, lr				@ do no switch modes, but
+						@ return to caller
+
+/*
+ * Secondary CPUs start here and call the code for the core specific parts
+ * of the non-secure and HYP mode transition. The GIC distributor specific
+ * code has already been executed by a C function before.
+ * Then they go back to wfi and wait to be woken up by the kernel again.
+ */
+ENTRY(_smp_pen)
+	mrs	r0, cpsr
+	orr	r0, r0, #0xc0
+	msr	cpsr, r0			@ disable interrupts
+	ldr	r1, =_start
+	mcr	p15, 0, r1, c12, c0, 0		@ set VBAR
+
+	bl	_nonsec_init
+	mov	r12, r0				@ save GICC address
+#ifdef CONFIG_ARMV7_VIRT
+	bl	_switch_to_hyp
+#endif
+
+	ldr	r1, [r12, #GICC_IAR]		@ acknowledge IPI
+	str	r1, [r12, #GICC_EOIR]		@ signal end of interrupt
+
+	adr	r0, _smp_pen			@ do not use this address again
+	b	smp_waitloop			@ wait for IPIs, board specific
+ENDPROC(_smp_pen)
+
+/*
+ * Switch a core to non-secure state.
+ *
+ *  1. initialize the GIC per-core interface
+ *  2. allow coprocessor access in non-secure modes
+ *  3. switch the cpu mode (by calling "smc #0")
+ *
+ * Called from smp_pen by secondary cores and directly by the BSP.
+ * Do not assume that the stack is available and only use registers
+ * r0-r3 and r12.
+ *
+ * PERIPHBASE is used to get the GIC address. This could be 40 bits long,
+ * though, but we check this in C before calling this function.
+ */
+ENTRY(_nonsec_init)
+#ifdef CONFIG_ARM_GIC_BASE_ADDRESS
+	ldr	r2, =CONFIG_ARM_GIC_BASE_ADDRESS
+#else
+	mrc	p15, 4, r2, c15, c0, 0		@ read CBAR
+	bfc	r2, #0, #15			@ clear reserved bits
+#endif
+	add	r3, r2, #GIC_DIST_OFFSET	@ GIC dist i/f offset
+	mvn	r1, #0				@ all bits to 1
+	str	r1, [r3, #GICD_IGROUPRn]	@ allow private interrupts
+
+	mrc	p15, 0, r0, c0, c0, 0		@ read MIDR
+	ldr	r1, =MIDR_PRIMARY_PART_MASK
+	and	r0, r0, r1			@ mask out variant and revision
+
+	ldr	r1, =MIDR_CORTEX_A7_R0P0 & MIDR_PRIMARY_PART_MASK
+	cmp	r0, r1				@ check for Cortex-A7
+
+	ldr	r1, =MIDR_CORTEX_A15_R0P0 & MIDR_PRIMARY_PART_MASK
+	cmpne	r0, r1				@ check for Cortex-A15
+
+	movne	r1, #GIC_CPU_OFFSET_A9		@ GIC CPU offset for A9
+	moveq	r1, #GIC_CPU_OFFSET_A15		@ GIC CPU offset for A15/A7
+	add	r3, r2, r1			@ r3 = GIC CPU i/f addr
+
+	mov	r1, #1				@ set GICC_CTLR[enable]
+	str	r1, [r3, #GICC_CTLR]		@ and clear all other bits
+	mov	r1, #0xff
+	str	r1, [r3, #GICC_PMR]		@ set priority mask register
+
+	movw	r1, #0x3fff
+	movt	r1, #0x0006
+	mcr	p15, 0, r1, c1, c1, 2		@ NSACR = all copros to non-sec
+
+/* The CNTFRQ register of the generic timer needs to be
+ * programmed in secure state. Some primary bootloaders / firmware
+ * omit this, so if the frequency is provided in the configuration,
+ * we do this here instead.
+ * But first check if we have the generic timer.
+ */
+#ifdef CONFIG_SYS_CLK_FREQ
+	mrc	p15, 0, r0, c0, c1, 1		@ read ID_PFR1
+	and	r0, r0, #CPUID_ARM_GENTIMER_MASK	@ mask arch timer bits
+	cmp	r0, #(1 << CPUID_ARM_GENTIMER_SHIFT)
+	ldreq	r1, =CONFIG_SYS_CLK_FREQ
+	mcreq	p15, 0, r1, c14, c0, 0		@ write CNTFRQ
+#endif
+
+	adr	r1, _monitor_vectors
+	mcr	p15, 0, r1, c12, c0, 1		@ set MVBAR to secure vectors
+
+	mrc	p15, 0, ip, c12, c0, 0		@ save secure copy of VBAR
+
+	isb
+	smc	#0				@ call into MONITOR mode
+
+	mcr	p15, 0, ip, c12, c0, 0		@ write non-secure copy of VBAR
+
+	mov	r1, #1
+	str	r1, [r3, #GICC_CTLR]		@ enable non-secure CPU i/f
+	add	r2, r2, #GIC_DIST_OFFSET
+	str	r1, [r2, #GICD_CTLR]		@ allow private interrupts
+
+	mov	r0, r3				@ return GICC address
+
+	bx	lr
+ENDPROC(_nonsec_init)
+
+#ifdef CONFIG_SMP_PEN_ADDR
+/* void __weak smp_waitloop(unsigned previous_address); */
+ENTRY(smp_waitloop)
+	wfi
+	ldr	r1, =CONFIG_SMP_PEN_ADDR	@ load start address
+	ldr	r1, [r1]
+	cmp	r0, r1			@ make sure we dont execute this code
+	beq	smp_waitloop		@ again (due to a spurious wakeup)
+	mov	pc, r1
+ENDPROC(smp_waitloop)
+.weak smp_waitloop
+#endif
+
+ENTRY(_switch_to_hyp)
+	mov	r0, lr
+	mov	r1, sp				@ save SVC copy of LR and SP
+	isb
+	hvc #0			 @ for older asm: .byte 0x70, 0x00, 0x40, 0xe1
+	mov	sp, r1
+	mov	lr, r0				@ restore SVC copy of LR and SP
+
+	bx	lr
+ENDPROC(_switch_to_hyp)