1 files changed, 116 insertions, 0 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index fcc12d842bcc..5498a6d88ba2 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -710,6 +710,67 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
 	return AE_OK;
 }
 
+#ifdef readq
+static inline u64 read64(const volatile void __iomem *addr)
+{
+	return readq(addr);
+}
+#else
+static inline u64 read64(const volatile void __iomem *addr)
+{
+	u64 l, h;
+	l = readl(addr);
+	h = readl(addr+4);
+	return l | (h << 32);
+}
+#endif
+
+acpi_status
+acpi_os_read_memory64(acpi_physical_address phys_addr, u64 *value, u32 width)
+{
+	void __iomem *virt_addr;
+	unsigned int size = width / 8;
+	bool unmap = false;
+	u64 dummy;
+
+	rcu_read_lock();
+	virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
+	if (!virt_addr) {
+		rcu_read_unlock();
+		virt_addr = acpi_os_ioremap(phys_addr, size);
+		if (!virt_addr)
+			return AE_BAD_ADDRESS;
+		unmap = true;
+	}
+
+	if (!value)
+		value = &dummy;
+
+	switch (width) {
+	case 8:
+		*(u8 *) value = readb(virt_addr);
+		break;
+	case 16:
+		*(u16 *) value = readw(virt_addr);
+		break;
+	case 32:
+		*(u32 *) value = readl(virt_addr);
+		break;
+	case 64:
+		*(u64 *) value = read64(virt_addr);
+		break;
+	default:
+		BUG();
+	}
+
+	if (unmap)
+		iounmap(virt_addr);
+	else
+		rcu_read_unlock();
+
+	return AE_OK;
+}
+
 acpi_status
 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
 {
@@ -749,6 +810,61 @@ acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
 	return AE_OK;
 }
 
+#ifdef writeq
+static inline void write64(u64 val, volatile void __iomem *addr)
+{
+	writeq(val, addr);
+}
+#else
+static inline void write64(u64 val, volatile void __iomem *addr)
+{
+	writel(val, addr);
+	writel(val>>32, addr+4);
+}
+#endif
+
+acpi_status
+acpi_os_write_memory64(acpi_physical_address phys_addr, u64 value, u32 width)
+{
+	void __iomem *virt_addr;
+	unsigned int size = width / 8;
+	bool unmap = false;
+
+	rcu_read_lock();
+	virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
+	if (!virt_addr) {
+		rcu_read_unlock();
+		virt_addr = acpi_os_ioremap(phys_addr, size);
+		if (!virt_addr)
+			return AE_BAD_ADDRESS;
+		unmap = true;
+	}
+
+	switch (width) {
+	case 8:
+		writeb(value, virt_addr);
+		break;
+	case 16:
+		writew(value, virt_addr);
+		break;
+	case 32:
+		writel(value, virt_addr);
+		break;
+	case 64:
+		write64(value, virt_addr);
+		break;
+	default:
+		BUG();
+	}
+
+	if (unmap)
+		iounmap(virt_addr);
+	else
+		rcu_read_unlock();
+
+	return AE_OK;
+}
+
 acpi_status
 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
 			       u64 *value, u32 width)