[Xen-devel] [RFC 29/29] xen/arm64: Remove hardcoded value for gic in assembly code

[Julien Grall <julien.grall@xxxxxxxxxx>]

- arm64: use V2M_GIC_BASE_ADDRESS
- only expose GIC_*_ADDRESS to assembly. The C code uses base addresses
provide by the device tree

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
---
 xen/arch/arm/arm64/mode_switch.S |    7 ++++---
 xen/include/asm-arm/config.h     |    8 ++++++--
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/xen/arch/arm/arm64/mode_switch.S b/xen/arch/arm/arm64/mode_switch.S
index 4c38181..d115706 100644
--- a/xen/arch/arm/arm64/mode_switch.S
+++ b/xen/arch/arm/arm64/mode_switch.S
@@ -21,6 +21,7 @@
 #include <asm/config.h>
 #include <asm/page.h>
 #include <asm/asm_defns.h>
+#include <asm/platforms/vexpress.h>
 
 /* Get up a CPU into EL2.  Clobbers x0-x3.
  *
@@ -53,18 +54,18 @@ enter_el2_mode:
          */
         cbnz    x22, 1f
 
-        ldr     x1, =(GIC_BASE_ADDRESS+GIC_DR_OFFSET) // GICD_CTLR
+        ldr     x1, =(V2M_GIC_BASE_ADDRESS+GIC_DR_OFFSET) // GICD_CTLR
         mov     w0, #3                          // EnableGrp0 | EnableGrp1
         str     w0, [x1]
 
-1:      ldr     x1, =(GIC_BASE_ADDRESS+GIC_DR_OFFSET+0x80) // GICD_IGROUPR
+1:      ldr     x1, =(V2M_GIC_BASE_ADDRESS+GIC_DR_OFFSET+0x80) // GICD_IGROUPR
         mov     w0, #~0                         // Grp1 interrupts
         str     w0, [x1], #4
         b.ne    2f                              // Only local interrupts for 
secondary CPUs
         str     w0, [x1], #4
         str     w0, [x1], #4
 
-2:      ldr     x1, =(GIC_BASE_ADDRESS+GIC_CR_OFFSET) // GICC_CTLR
+2:      ldr     x1, =(V2M_GIC_BASE_ADDRESS+GIC_CR_OFFSET) // GICC_CTLR
         ldr     w0, [x1]
         mov     w0, #3                          // EnableGrp0 | EnableGrp1
         str     w0, [x1]
diff --git a/xen/include/asm-arm/config.h b/xen/include/asm-arm/config.h
index 943175f..eb13bf4 100644
--- a/xen/include/asm-arm/config.h
+++ b/xen/include/asm-arm/config.h
@@ -141,12 +141,16 @@ extern unsigned long frametable_virt_end;
 #define watchdog_disable() ((void)0)
 #define watchdog_enable()  ((void)0)
 
-/* Board-specific: base address of GIC + its regs */
-#define GIC_BASE_ADDRESS 0x2c000000
+#ifdef __ASSEMBLY__
+/* Board-specific: regs base address for the GIC
+ * Theses constants are only intend to be used in assembly file
+ * because the DT is not yet parsed.t diff
+ */
 #define GIC_DR_OFFSET 0x1000
 #define GIC_CR_OFFSET 0x2000
 #define GIC_HR_OFFSET 0x4000 /* Guess work 
http://lists.infradead.org/pipermail/linux-arm-kernel/2011-September/064219.html
 */
 #define GIC_VR_OFFSET 0x6000 /* Virtual Machine CPU interface) */
+#endif /* __ASSEMBLY__ */
 
 #endif /* __ARM_CONFIG_H__ */
 /*
-- 
Julien Grall


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