[PATCH 05/23] Add common PPC64 KVM asm helpers

[Alexander Graf <agraf@suse.de>]

We will have to fiddle with a bunch of assembly later on. In order to make
this more readable, let's define some macros we can use then.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 arch/powerpc/include/asm/kvm_970_asm.h |  128 ++++++++++++++++++++++++++++++++
 1 files changed, 128 insertions(+), 0 deletions(-)
 create mode 100644 arch/powerpc/include/asm/kvm_970_asm.h

diff --git a/arch/powerpc/include/asm/kvm_970_asm.h b/arch/powerpc/include/asm/kvm_970_asm.h
new file mode 100644
index 0000000..9b715e2
--- /dev/null
+++ b/arch/powerpc/include/asm/kvm_970_asm.h
@@ -0,0 +1,128 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * 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, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * Copyright SUSE Linux Products GmbH 2009
+ *
+ * Authors: Alexander Graf <agraf@suse.de>
+ */
+
+#ifndef __ASM_KVM_970_ASM_H__
+#define __ASM_KVM_970_ASM_H__
+
+#ifdef CONFIG_KVM_970_HANDLER
+
+#include <asm/ppc_asm.h>
+#include <asm/kvm_asm.h>
+#include <asm/reg.h>
+#include <asm/page.h>
+#include <asm/asm-offsets.h>
+#include <asm/exception.h>
+
+#define ULONG_SIZE 8
+#define KVMPPC_HANDLE_EXIT .kvmppc_handle_exit
+
+.macro to_phys dest_reg, source_reg
+#if PAGE_OFFSET = 0xc000000000000000
+	clrldi	\dest_reg, \source_reg, 2
+#else
+	#error Unknown PAGE_OFFSET
+#endif
+.endm
+
+.macro loadimm reg, imm
+	lis	\reg,       \imm@highest
+	ori	\reg, \reg, \imm@higher
+	rldicr	\reg, \reg, 32, 31
+	oris	\reg, \reg, \imm@h
+	ori	\reg, \reg, \imm@l
+.endm
+
+.macro DISABLE_INTERRUPTS
+	mfmsr	r0
+	rldicl	r0,r0,48,1
+	rotldi	r0,r0,16
+	mtmsrd	r0,1
+.endm
+
+.macro setmagc reg
+	ori	\reg, r13, 1		/* r3 = PACA | 1 */
+	mtspr	SPRN_SPRG3, \reg	/* SPRG3 =PACA | 1 */
+.endm
+
+#define HOST_STACK_R1	(0 * ULONG_SIZE)
+/* We need to keep some space here that the C function */
+/* we jump into later can clobber */
+#define HOST_STACK_LR	(8 * ULONG_SIZE)
+#define HOST_STACK_RUN	(9 * ULONG_SIZE)
+#define HOST_STACK_VCPU	(10 * ULONG_SIZE)
+#define HOST_STACK_R14	(14 * ULONG_SIZE)
+#define HOST_STACK_R15	(15 * ULONG_SIZE)
+#define HOST_STACK_R16	(16 * ULONG_SIZE)
+#define HOST_STACK_R17	(17 * ULONG_SIZE)
+#define HOST_STACK_R18	(18 * ULONG_SIZE)
+#define HOST_STACK_R19	(19 * ULONG_SIZE)
+#define HOST_STACK_R20	(20 * ULONG_SIZE)
+#define HOST_STACK_R21	(21 * ULONG_SIZE)
+#define HOST_STACK_R22	(22 * ULONG_SIZE)
+#define HOST_STACK_R23	(23 * ULONG_SIZE)
+#define HOST_STACK_R24	(24 * ULONG_SIZE)
+#define HOST_STACK_R25	(25 * ULONG_SIZE)
+#define HOST_STACK_R26	(26 * ULONG_SIZE)
+#define HOST_STACK_R27	(27 * ULONG_SIZE)
+#define HOST_STACK_R28	(28 * ULONG_SIZE)
+#define HOST_STACK_R29	(29 * ULONG_SIZE)
+#define HOST_STACK_R30	(30 * ULONG_SIZE)
+#define HOST_STACK_R31	(31 * ULONG_SIZE)
+#define HOST_STACK_MIN_SIZE (HOST_STACK_R31 + ULONG_SIZE)
+#define HOST_STACK_SIZE (((HOST_STACK_MIN_SIZE + 15) / 16) * 16) /* Align. */
+#define VCPU_GPR(n)     (VCPU_GPRS + (n * ULONG_SIZE))
+
+.macro mfpaca tmp_reg, src_reg, offset, vcpu_reg
+	ld	\tmp_reg, (PACA_EXMC+\offset)(r13)
+	std	\tmp_reg, VCPU_GPR(\src_reg)(\vcpu_reg)
+.endm
+
+
+.macro DO_KVM intno
+	.if (\intno = PPC970_INTERRUPT_SYSTEM_RESET) || \
+	    (\intno = PPC970_INTERRUPT_MACHINE_CHECK) || \
+	    (\intno = PPC970_INTERRUPT_DATA_STORAGE) || \
+	    (\intno = PPC970_INTERRUPT_INST_STORAGE) || \
+	    (\intno = PPC970_INTERRUPT_DATA_SEGMENT) || \
+	    (\intno = PPC970_INTERRUPT_INST_SEGMENT) || \
+	    (\intno = PPC970_INTERRUPT_EXTERNAL) || \
+	    (\intno = PPC970_INTERRUPT_ALIGNMENT) || \
+	    (\intno = PPC970_INTERRUPT_PROGRAM) || \
+	    (\intno = PPC970_INTERRUPT_FP_UNAVAIL) || \
+	    (\intno = PPC970_INTERRUPT_DECREMENTER) || \
+	    (\intno = PPC970_INTERRUPT_SYSCALL) || \
+	    (\intno = PPC970_INTERRUPT_TRACE) || \
+	    (\intno = PPC970_INTERRUPT_PERFMON) || \
+	    (\intno = PPC970_INTERRUPT_ALTIVEC) || \
+	    (\intno = PPC970_INTERRUPT_VSX)
+
+	b	kvmppc_trampoline_\intno
+kvmppc_resume_\intno:
+
+	.endif
+.endm
+
+#else
+
+.macro DO_KVM intno
+.endm
+
+#endif /* CONFIG_KVM_970_HANDLER */
+
+#endif /* __ASM_KVM_970_ASM_H__ */
-- 
1.6.0.2