[Xen-devel] [PATCH v5 02/22] arm/acpi: Add a helper function to get the acpi table offset

[Shannon Zhao <zhaoshenglong@xxxxxxxxxx>]

From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

These tables are aligned with 64bit.

Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
v5: make the return value type and variable type consistent
---
 xen/arch/arm/acpi/lib.c    | 15 +++++++++++++++
 xen/include/asm-arm/acpi.h |  6 ++++++
 2 files changed, 21 insertions(+)

diff --git a/xen/arch/arm/acpi/lib.c b/xen/arch/arm/acpi/lib.c
index db5c4d8..79f7edd 100644
--- a/xen/arch/arm/acpi/lib.c
+++ b/xen/arch/arm/acpi/lib.c
@@ -60,3 +60,18 @@ bool_t __init acpi_psci_hvc_present(void)
 {
     return acpi_gbl_FADT.arm_boot_flags & ACPI_FADT_PSCI_USE_HVC;
 }
+
+paddr_t __init acpi_get_table_offset(struct membank tbl_add[],
+                                     EFI_MEM_RES index)
+{
+    int i;
+    paddr_t offset = 0;
+
+    for ( i = 0; i < index; i++ )
+    {
+        /* Aligned with 64bit (8 bytes) */
+        offset += ROUNDUP(tbl_add[i].size, 8);
+    }
+
+    return offset;
+}
diff --git a/xen/include/asm-arm/acpi.h b/xen/include/asm-arm/acpi.h
index 7f59761..6db3711 100644
--- a/xen/include/asm-arm/acpi.h
+++ b/xen/include/asm-arm/acpi.h
@@ -25,6 +25,7 @@
 
 #include <xen/init.h>
 #include <asm/page.h>
+#include <asm/setup.h>
 
 #define COMPILER_DEPENDENT_INT64   long long
 #define COMPILER_DEPENDENT_UINT64  unsigned long long
@@ -58,10 +59,15 @@ static inline void enable_acpi(void)
 {
     acpi_disabled = 0;
 }
+
+paddr_t acpi_get_table_offset(struct membank tbl_add[], EFI_MEM_RES index);
 #else
 #define acpi_disabled (1)
 #define disable_acpi()
 #define enable_acpi()
+paddr_t inline acpi_get_table_offset(struct membank tbl_add[],
+                                     EFI_MEM_RES index)
+{ return 0; }
 #endif
 
 #endif /*_ASM_ARM_ACPI_H*/
-- 
2.0.4



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