[Xen-devel] [PATCH RFC 26/35] arm : acpi read mmio tables from uefi

[parth.dixit@xxxxxxxxxx]

From: Parth Dixit <parth.dixit@xxxxxxxxxx>

For ACPI on arm device initialization is done by dom0 after parsing DSDT.
xen requires mmio region information described in uefi tables
for mapping it to dom0.

Signed-off-by: Parth Dixit <parth.dixit@xxxxxxxxxx>
---
 xen/arch/arm/efi/efi-boot.h | 16 ++++++++++++++++
 xen/arch/arm/setup.c        |  1 +
 xen/include/asm-arm/setup.h |  1 +
 3 files changed, 18 insertions(+)

diff --git a/xen/arch/arm/efi/efi-boot.h b/xen/arch/arm/efi/efi-boot.h
index 639942d..535f484 100644
--- a/xen/arch/arm/efi/efi-boot.h
+++ b/xen/arch/arm/efi/efi-boot.h
@@ -127,6 +127,8 @@ static EFI_STATUS __init 
efi_process_memory_map_bootinfo(EFI_MEMORY_DESCRIPTOR *
 {
     int Index;
     int i = 0;
+    int j = 0;
+
     EFI_MEMORY_DESCRIPTOR *desc_ptr = map;
 
     for ( Index = 0; Index < (mmap_size / desc_size); Index++ )
@@ -145,10 +147,24 @@ static EFI_STATUS __init 
efi_process_memory_map_bootinfo(EFI_MEMORY_DESCRIPTOR *
                 break;
             }
         }
+        else if ( desc_ptr->Type == EfiMemoryMappedIO
+                  || desc_ptr->Type == EfiMemoryMappedIOPortSpace )
+        {
+            acpi_mmio.bank[j].start = desc_ptr->PhysicalStart;
+            acpi_mmio.bank[j].size  = desc_ptr->NumberOfPages * EFI_PAGE_SIZE;
+            if ( ++j >= NR_MEM_BANKS )
+            {
+                PrintStr(L"Warning: All ");
+                DisplayUint(NR_MEM_BANKS, -1);
+                PrintStr(L" acpi meminfo mem banks exhausted.\r\n");
+                break;
+            }
+        }
         desc_ptr = NextMemoryDescriptor(desc_ptr, desc_size);
     }
 
     bootinfo.mem.nr_banks = i;
+    acpi_mmio.nr_banks = j;
     return EFI_SUCCESS;
 }
 
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 93c8a8a..930746b 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -50,6 +50,7 @@
 #include <asm-arm/cputype.h>
 
 struct bootinfo __initdata bootinfo;
+struct meminfo __initdata acpi_mmio;
 
 struct cpuinfo_arm __read_mostly boot_cpu_data;
 
diff --git a/xen/include/asm-arm/setup.h b/xen/include/asm-arm/setup.h
index ba5a67d..5ea9ed6 100644
--- a/xen/include/asm-arm/setup.h
+++ b/xen/include/asm-arm/setup.h
@@ -46,6 +46,7 @@ struct bootinfo {
 };
 
 extern struct bootinfo bootinfo;
+extern struct meminfo acpi_mmio;
 
 void arch_init_memory(void);
 
-- 
1.9.1


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