diff options
Diffstat (limited to 'ArmPlatformPkg/Sec/Helper.asm')
| -rw-r--r-- | ArmPlatformPkg/Sec/Helper.asm | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/ArmPlatformPkg/Sec/Helper.asm b/ArmPlatformPkg/Sec/Helper.asm index a03a90626e..b31cc31a97 100644 --- a/ArmPlatformPkg/Sec/Helper.asm +++ b/ArmPlatformPkg/Sec/Helper.asm @@ -20,17 +20,18 @@ // r0: Monitor World EntryPoint
// r1: MpId
-// r2: Secure Monitor mode stack
-enter_monitor_mode
- cmp r2, #0 // If a Secure Monitor stack base has not been defined then use the Secure stack
- moveq r2, sp
+// r2: SecBootMode
+// r3: Secure Monitor mode stack
+enter_monitor_mode FUNCTION
+ cmp r3, #0 // If a Secure Monitor stack base has not been defined then use the Secure stack
+ moveq r3, sp
mrs r4, cpsr // Save current mode (SVC) in r4
- bic r3, r4, #0x1f // Clear all mode bits
- orr r3, r3, #0x16 // Set bits for Monitor mode
- msr cpsr_cxsf, r3 // We are now in Monitor Mode
+ bic r5, r4, #0x1f // Clear all mode bits
+ orr r5, r5, #0x16 // Set bits for Monitor mode
+ msr cpsr_cxsf, r5 // We are now in Monitor Mode
- mov sp, r2 // Set the stack of the Monitor Mode
+ mov sp, r3 // Set the stack of the Monitor Mode
mov lr, r0 // Use the pass entrypoint as lr
@@ -38,8 +39,11 @@ enter_monitor_mode mov r4, r0 // Swap EntryPoint and MpId registers
mov r0, r1
+ mov r1, r2
+ mov r2, r3
bx r4
+ ENDFUNC
// We cannot use the instruction 'movs pc, lr' because the caller can be written either in ARM or Thumb2 assembler.
// When we will jump into this function, we will set the CPSR flag to ARM assembler. By copying directly 'lr' into
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