linux-kernel - [PATCH 10/16] clocksource: arm_arch_timer: add structs to describe MMIO timer

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Message-Id: <1492620273-30037-11-git-send-email-mark.rutland@arm.com>
Date:   Wed, 19 Apr 2017 17:44:27 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     daniel.lezcano@...aro.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        tglx@...utronix.de, fu.wei@...aro.org, lorenzo.pieralisi@....com,
        hanjun.guo@...aro.org, marc.zyngier@....com
Subject: [PATCH 10/16] clocksource: arm_arch_timer: add structs to describe MMIO timer

From: Fu Wei <fu.wei@...aro.org>

In preparation for ACPI GTDT support, this patch adds structs to
describe the MMIO timers indepedent of the firmware interface.

Subsequent patches will use these to split the FW/HW probing logic, so
that the HW probing logic can be shared by ACPI and DT.

Signed-off-by: Fu Wei <fu.wei@...aro.org>
Reviewed-by: Hanjun Guo <hanjun.guo@...aro.org>
Signed-off-by: Mark Rutland <mark.rutland@....com>
---
 include/clocksource/arm_arch_timer.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/include/clocksource/arm_arch_timer.h b/include/clocksource/arm_arch_timer.h
index 4a98c06..cc805b7 100644
--- a/include/clocksource/arm_arch_timer.h
+++ b/include/clocksource/arm_arch_timer.h
@@ -57,6 +57,8 @@ enum arch_timer_spi_nr {
 #define ARCH_TIMER_MEM_PHYS_ACCESS	2
 #define ARCH_TIMER_MEM_VIRT_ACCESS	3
 
+#define ARCH_TIMER_MEM_MAX_FRAMES	8
+
 #define ARCH_TIMER_USR_PCT_ACCESS_EN	(1 << 0) /* physical counter */
 #define ARCH_TIMER_USR_VCT_ACCESS_EN	(1 << 1) /* virtual counter */
 #define ARCH_TIMER_VIRT_EVT_EN		(1 << 2)
@@ -72,6 +74,20 @@ struct arch_timer_kvm_info {
 	int virtual_irq;
 };
 
+struct arch_timer_mem_frame {
+	bool valid;
+	phys_addr_t cntbase;
+	size_t size;
+	int phys_irq;
+	int virt_irq;
+};
+
+struct arch_timer_mem {
+	phys_addr_t cntctlbase;
+	size_t size;
+	struct arch_timer_mem_frame frame[ARCH_TIMER_MEM_MAX_FRAMES];
+};
+
 #ifdef CONFIG_ARM_ARCH_TIMER
 
 extern u32 arch_timer_get_rate(void);
-- 
1.9.1