[PATCH v7 02/22] arm/acpi: Add a helper function to get the acpi table offset

[Shannon Zhao <shannon.zhao@linaro.org>]

These tables are aligned with 64bit.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
v7: add commnets to explain what thsi function does
---
 xen/arch/arm/acpi/lib.c    | 20 ++++++++++++++++++++
 xen/include/asm-arm/acpi.h |  2 ++
 2 files changed, 22 insertions(+)

diff --git a/xen/arch/arm/acpi/lib.c b/xen/arch/arm/acpi/lib.c
index db5c4d8..cee2454 100644
--- a/xen/arch/arm/acpi/lib.c
+++ b/xen/arch/arm/acpi/lib.c
@@ -60,3 +60,23 @@ bool_t __init acpi_psci_hvc_present(void)
 {
     return acpi_gbl_FADT.arm_boot_flags & ACPI_FADT_PSCI_USE_HVC;
 }
+
+/*
+ * This function is used to get the offset of some new created ACPI or EFI table
+ * in the allocated memory region. Currently the tables should be created in the
+ * order of enum EFI_MEM_RES.
+ */
+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..569fc31 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
@@ -45,6 +46,7 @@ typedef enum {
 bool_t __init acpi_psci_present(void);
 bool_t __init acpi_psci_hvc_present(void);
 void __init acpi_smp_init_cpus(void);
+paddr_t acpi_get_table_offset(struct membank tbl_add[], EFI_MEM_RES index);
 
 #ifdef CONFIG_ACPI
 extern bool_t acpi_disabled;
-- 
2.1.4


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel