[Xen-devel] [PATCH v7 03/22] arm/acpi: Add __acpi_map_table function for ARM

[Shannon Zhao <zhaoshenglong@xxxxxxxxxx>]

From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

Implement __acpi_map_table function for ARM. Move FIX_ACPI_PAGES to
common place and rename it to NUM_FIXMAP_ACPI_PAGES.

Cc: Jan Beulich <jbeulich@xxxxxxxx>
Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
v7: fix coding style
---
 xen/arch/arm/Makefile        |  1 +
 xen/arch/arm/acpi/Makefile   |  1 +
 xen/arch/arm/acpi/lib.c      | 53 ++++++++++++++++++++++++++++++++++++++++++++
 xen/include/asm-arm/config.h |  2 ++
 xen/include/asm-x86/acpi.h   |  3 ---
 xen/include/asm-x86/fixmap.h |  4 ++--
 xen/include/xen/acpi.h       |  6 +++++
 7 files changed, 65 insertions(+), 5 deletions(-)
 create mode 100644 xen/arch/arm/acpi/Makefile
 create mode 100644 xen/arch/arm/acpi/lib.c

diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile
index 1783912..6d51094 100644
--- a/xen/arch/arm/Makefile
+++ b/xen/arch/arm/Makefile
@@ -2,6 +2,7 @@ subdir-$(CONFIG_ARM_32) += arm32
 subdir-$(CONFIG_ARM_64) += arm64
 subdir-y += platforms
 subdir-$(CONFIG_ARM_64) += efi
+subdir-$(CONFIG_HAS_ACPI) += acpi
 
 obj-$(EARLY_PRINTK) += early_printk.o
 obj-y += cpu.o
diff --git a/xen/arch/arm/acpi/Makefile b/xen/arch/arm/acpi/Makefile
new file mode 100644
index 0000000..b5be22d
--- /dev/null
+++ b/xen/arch/arm/acpi/Makefile
@@ -0,0 +1 @@
+obj-y += lib.o
diff --git a/xen/arch/arm/acpi/lib.c b/xen/arch/arm/acpi/lib.c
new file mode 100644
index 0000000..9ff8a9c
--- /dev/null
+++ b/xen/arch/arm/acpi/lib.c
@@ -0,0 +1,53 @@
+/*
+ *  lib.c - Architecture-Specific Low-Level ACPI Support
+ *
+ *  Copyright (C) 2015, Shannon Zhao <shannon.zhao@xxxxxxxxxx>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <xen/acpi.h>
+#include <xen/mm.h>
+#include <asm/config.h>
+
+char *__acpi_map_table(paddr_t phys, unsigned long size)
+{
+    unsigned long base, offset, mapped_size;
+    int idx;
+
+    offset = phys & (PAGE_SIZE - 1);
+    mapped_size = PAGE_SIZE - offset;
+    set_fixmap(FIXMAP_ACPI_BEGIN, phys >> PAGE_SHIFT, PAGE_HYPERVISOR);
+    base = FIXMAP_ADDR(FIXMAP_ACPI_BEGIN);
+
+    /*
+     * Most cases can be covered by the below.
+     */
+    idx = FIXMAP_ACPI_BEGIN;
+    while ( mapped_size < size )
+    {
+        if ( ++idx > FIXMAP_ACPI_END )
+            return NULL;    /* cannot handle this */
+        phys += PAGE_SIZE;
+        set_fixmap(idx, phys >> PAGE_SHIFT, PAGE_HYPERVISOR);
+        mapped_size += PAGE_SIZE;
+    }
+
+    return ((char *) base + offset);
+}
diff --git a/xen/include/asm-arm/config.h b/xen/include/asm-arm/config.h
index a1b968d..a26cb1a 100644
--- a/xen/include/asm-arm/config.h
+++ b/xen/include/asm-arm/config.h
@@ -180,6 +180,8 @@
 #define FIXMAP_GICC1    4  /* Interrupt controller: CPU registers (first page) 
*/
 #define FIXMAP_GICC2    5  /* Interrupt controller: CPU registers (second 
page) */
 #define FIXMAP_GICH     6  /* Interrupt controller: virtual interface control 
registers */
+#define FIXMAP_ACPI_BEGIN  7  /* Start mappings of ACPI tables */
+#define FIXMAP_ACPI_END    (FIXMAP_ACPI_BEGIN + NUM_FIXMAP_ACPI_PAGES - 1)  /* 
End mappings of ACPI tables */
 
 #define PAGE_SHIFT              12
 
diff --git a/xen/include/asm-x86/acpi.h b/xen/include/asm-x86/acpi.h
index d532e3d..49f7e1e 100644
--- a/xen/include/asm-x86/acpi.h
+++ b/xen/include/asm-x86/acpi.h
@@ -90,9 +90,6 @@ static inline void disable_acpi(void)
        acpi_noirq = 1;
 }
 
-/* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
-#define FIX_ACPI_PAGES 4
-
 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
 
 /* routines for saving/restoring kernel state */
diff --git a/xen/include/asm-x86/fixmap.h b/xen/include/asm-x86/fixmap.h
index 1e24b11..dc0856f 100644
--- a/xen/include/asm-x86/fixmap.h
+++ b/xen/include/asm-x86/fixmap.h
@@ -19,11 +19,11 @@
 
 #ifndef __ASSEMBLY__
 
+#include <xen/acpi.h>
 #include <xen/pfn.h>
 #include <xen/kexec.h>
 #include <xen/iommu.h>
 #include <asm/apicdef.h>
-#include <asm/acpi.h>
 #include <asm/amd-iommu.h>
 #include <asm/msi.h>
 #include <acpi/apei.h>
@@ -51,7 +51,7 @@ enum fixed_addresses {
     FIX_IO_APIC_BASE_0,
     FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
     FIX_ACPI_BEGIN,
-    FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
+    FIX_ACPI_END = FIX_ACPI_BEGIN + NUM_FIXMAP_ACPI_PAGES - 1,
     FIX_HPET_BASE,
     FIX_TBOOT_SHARED_BASE,
     FIX_MSIX_IO_RESERV_BASE,
diff --git a/xen/include/xen/acpi.h b/xen/include/xen/acpi.h
index 65e53a6..6633414 100644
--- a/xen/include/xen/acpi.h
+++ b/xen/include/xen/acpi.h
@@ -39,6 +39,12 @@
 #define ACPI_MADT_GET_POLARITY(inti)   ACPI_MADT_GET_(POLARITY, inti)
 #define ACPI_MADT_GET_TRIGGER(inti)    ACPI_MADT_GET_(TRIGGER, inti)
 
+/*
+ * Fixmap pages to reserve for ACPI boot-time tables (see asm-x86/fixmap.h or
+ * asm-arm/config.h)
+ */
+#define NUM_FIXMAP_ACPI_PAGES  4
+
 #ifdef CONFIG_ACPI_BOOT
 
 enum acpi_interrupt_id {
-- 
2.0.4



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