Change in coreboot[master]: libpayload/arm*: Add 64bit memory access primitives

[Patrick Georgi (Code Review)]

Patrick Georgi has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/50115 )

Change subject: libpayload/arm*: Add 64bit memory access primitives
......................................................................

libpayload/arm*: Add 64bit memory access primitives

Add read64 and write64 for consistency with x86.

BUG=b:178785769

Change-Id: I342e3a23201d0b804ea5ecfe47ee3e4bb516de4c
Signed-off-by: Patrick Georgi 
---
M payloads/libpayload/include/arm/arch/io.h
M payloads/libpayload/include/arm64/arch/io.h
2 files changed, 26 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/15/50115/1

diff --git a/payloads/libpayload/include/arm/arch/io.h b/payloads/libpayload/include/arm/arch/io.h
index 6d549de..ce48baf 100644
--- a/payloads/libpayload/include/arm/arch/io.h
+++ b/payloads/libpayload/include/arm/arch/io.h
@@ -98,6 +98,12 @@
    return *(volatile uint32_t *)addr;
 }

+static inline uint64_t read64(const void *addr)
+{
+	dmb();
+	return *(volatile uint64_t *)addr;
+}
+
 static inline void write8(void *addr, uint8_t val)
 {
    dmb();
@@ -119,4 +125,11 @@
    dmb();
 }

+static inline void write64(void *addr, uint64_t val)
+{
+	dmb();
+	*(volatile uint64_t *)addr = val;
+	dmb();
+}
+
 #endif
diff --git a/payloads/libpayload/include/arm64/arch/io.h b/payloads/libpayload/include/arm64/arch/io.h
index 00c75c4..0921988 100644
--- a/payloads/libpayload/include/arm64/arch/io.h
+++ b/payloads/libpayload/include/arm64/arch/io.h
@@ -99,6 +99,12 @@
    return *(volatile uint32_t *)addr;
 }

+static inline uint64_t read64(const void *addr)
+{
+	dmb();
+	return *(volatile uint64_t *)addr;
+}
+
 static inline void write8(void *addr, uint8_t val)
 {
    dmb();
@@ -120,4 +126,11 @@
    dmb();
 }

+static inline void write64(void *addr, uint64_t val)
+{
+	dmb();
+	*(volatile uint64_t *)addr = val;
+	dmb();
+}
+
 #endif