[Xen-devel] [PATCH RFC 02/35] xen: arm64: ACPI: Support common ACPI drivers

[parth.dixit@xxxxxxxxxx]

From: Naresh Bhat <naresh.bhat@xxxxxxxxxx>

xen hypervisor will use ACPI for initialisation in the same manner that
current x86/x86_64 ones do. Add the calls to initialise the ACPI tables
and load devices using the xen/drivers/acpi subsytem.

Signed-off-by: Naresh Bhat <naresh.bhat@xxxxxxxxxx>
---
 xen/common/sysctl.c                   |   2 +
 xen/drivers/acpi/osl.c                |   6 ++
 xen/drivers/acpi/utilities/utglobal.c |   1 +
 xen/include/asm-arm/acpi.h            | 106 ++++++++++++++++++++++++++++++++++
 xen/include/asm-arm/arm64/page.h      |   2 +
 5 files changed, 117 insertions(+)
 create mode 100644 xen/include/asm-arm/acpi.h

diff --git a/xen/common/sysctl.c b/xen/common/sysctl.c
index 0cb6ee1..a700a16 100644
--- a/xen/common/sysctl.c
+++ b/xen/common/sysctl.c
@@ -170,6 +170,7 @@ long do_sysctl(XEN_GUEST_HANDLE_PARAM(xen_sysctl_t) 
u_sysctl)
         op->u.availheap.avail_bytes <<= PAGE_SHIFT;
         break;
 
+#ifdef CONFIG_X86
 #ifdef HAS_ACPI
     case XEN_SYSCTL_get_pmstat:
         ret = do_get_pm_info(&op->u.get_pmstat);
@@ -181,6 +182,7 @@ long do_sysctl(XEN_GUEST_HANDLE_PARAM(xen_sysctl_t) 
u_sysctl)
             copyback = 1;
         break;
 #endif
+#endif
 
     case XEN_SYSCTL_page_offline_op:
     {
diff --git a/xen/drivers/acpi/osl.c b/xen/drivers/acpi/osl.c
index 93c983c..73da9d9 100644
--- a/xen/drivers/acpi/osl.c
+++ b/xen/drivers/acpi/osl.c
@@ -96,7 +96,11 @@ acpi_os_map_memory(acpi_physical_address phys, acpi_size 
size)
                        return __va(phys);
                return __vmap(&pfn, PFN_UP(offs + size), 1, 1, 
PAGE_HYPERVISOR_NOCACHE) + offs;
        }
+#ifdef CONFIG_X86
        return __acpi_map_table(phys, size);
+#else
+       return __va(phys);
+#endif
 }
 
 void acpi_os_unmap_memory(void __iomem * virt, acpi_size size)
@@ -105,6 +109,7 @@ void acpi_os_unmap_memory(void __iomem * virt, acpi_size 
size)
                vunmap((void *)((unsigned long)virt & PAGE_MASK));
 }
 
+#ifdef CONFIG_X86
 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
 {
        u32 dummy;
@@ -140,6 +145,7 @@ acpi_status acpi_os_write_port(acpi_io_address port, u32 
value, u32 width)
 
        return AE_OK;
 }
+#endif
 
 acpi_status
 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
diff --git a/xen/drivers/acpi/utilities/utglobal.c 
b/xen/drivers/acpi/utilities/utglobal.c
index 7dbc964..65c918e 100644
--- a/xen/drivers/acpi/utilities/utglobal.c
+++ b/xen/drivers/acpi/utilities/utglobal.c
@@ -43,6 +43,7 @@
 
 #define DEFINE_ACPI_GLOBALS
 
+#include <asm/system.h>
 #include <xen/config.h>
 #include <xen/init.h>
 #include <xen/lib.h>
diff --git a/xen/include/asm-arm/acpi.h b/xen/include/asm-arm/acpi.h
new file mode 100644
index 0000000..f6284b5
--- /dev/null
+++ b/xen/include/asm-arm/acpi.h
@@ -0,0 +1,106 @@
+/*
+ *  Copyright (C) 2014, Naresh Bhat <naresh.bhat@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
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#ifndef _ASM_ARM64_ACPI_H
+#define _ASM_ARM64_ACPI_H
+
+#include <xen/init.h>
+
+#define COMPILER_DEPENDENT_INT64   long long
+#define COMPILER_DEPENDENT_UINT64  unsigned long long
+
+#define MAX_LOCAL_APIC 256
+#define MAX_IO_APICS 64
+
+/*
+ * Calling conventions:
+ *
+ * ACPI_SYSTEM_XFACE        - Interfaces to host OS (handlers, threads)
+ * ACPI_EXTERNAL_XFACE      - External ACPI interfaces
+ * ACPI_INTERNAL_XFACE      - Internal ACPI interfaces
+ * ACPI_INTERNAL_VAR_XFACE  - Internal variable-parameter list interfaces
+ */
+#define ACPI_SYSTEM_XFACE
+#define ACPI_EXTERNAL_XFACE
+#define ACPI_INTERNAL_XFACE
+#define ACPI_INTERNAL_VAR_XFACE
+
+/* Asm macros */
+#define ACPI_ASM_MACROS
+#define BREAKPOINT3
+#define ACPI_DISABLE_IRQS() local_irq_disable()
+#define ACPI_ENABLE_IRQS()  local_irq_enable()
+#define ACPI_FLUSH_CPU_CACHE() flush_cache_all()
+
+/* Blob handling macros */
+#define ACPI_BLOB_HEADER_SIZE   8
+
+/* Basic configuration for ACPI */
+#ifdef  CONFIG_ACPI
+extern int acpi_disabled;
+extern int acpi_noirq;
+extern int acpi_pci_disabled;
+extern int acpi_strict;
+
+/* map logic cpu id to physical APIC id
+ * APIC = GIC cpu interface on ARM
+ */
+extern volatile int arm_cpu_to_apicid[NR_CPUS];
+extern int boot_cpu_apic_id;
+#define cpu_physical_id(cpu) arm_cpu_to_apicid[cpu]
+
+struct acpi_arm_root {
+    paddr_t phys_address;
+    unsigned long size;
+};
+extern struct acpi_arm_root acpi_arm_rsdp_info;
+
+void arm_acpi_reserve_memory(void);
+
+/* Low-level suspend routine. */
+extern int (*acpi_suspend_lowlevel)(void);
+
+extern void prefill_possible_map(void);
+
+#define acpi_wakeup_address (0)
+
+static inline void disable_acpi(void)
+{
+    acpi_disabled = 1;
+    acpi_pci_disabled = 1;
+    acpi_noirq = 1;
+}
+static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
+static inline void acpi_disable_pci(void)
+{
+    acpi_pci_disabled = 1;
+    acpi_noirq_set();
+}
+
+#else   /* !CONFIG_ACPI */
+#define acpi_disabled 1 /* ACPI sometimes enabled on ARM */
+#define acpi_noirq 1    /* ACPI sometimes enabled on ARM */
+#define acpi_pci_disabled 1 /* ACPI PCI sometimes enabled on ARM */
+#define acpi_strict 1   /* no ACPI spec workarounds on ARM */
+#endif
+
+#endif /*_ASM_ARM_ACPI_H*/
diff --git a/xen/include/asm-arm/arm64/page.h b/xen/include/asm-arm/arm64/page.h
index 1fd416d..13b0ea1 100644
--- a/xen/include/asm-arm/arm64/page.h
+++ b/xen/include/asm-arm/arm64/page.h
@@ -1,6 +1,8 @@
 #ifndef __ARM_ARM64_PAGE_H__
 #define __ARM_ARM64_PAGE_H__
 
+#include <asm-arm/system.h>
+
 #ifndef __ASSEMBLY__
 
 /* Write a pagetable entry */
-- 
1.9.1


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