diff options
Diffstat (limited to 'src/kernel/start.S')
| -rw-r--r-- | src/kernel/start.S | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/kernel/start.S b/src/kernel/start.S index 008270b94..6474a2ced 100644 --- a/src/kernel/start.S +++ b/src/kernel/start.S @@ -5,7 +5,9 @@ # # OpenPOWER HostBoot Project # -# COPYRIGHT International Business Machines Corp. 2010,2014 +# Contributors Listed Below - COPYRIGHT 2010,2014 +# [+] International Business Machines Corp. +# # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. @@ -702,6 +704,7 @@ intvect_system_reset_external: ;// 0x801 = HMER write (r4 -> HMER). ;// 0x802 = SCRATCH read (r4 -> SPRC, SPRD -> r3). ;// 0x803 = SCRATCH write (r4 -> SPRC, r5 -> SPRD). + ;// 0x804 = PVR read (PVR -> r3). system_call_fast_path: ;// Check if this is HMER read (0x800). ;// Compare was already done in system call path. @@ -765,9 +768,15 @@ system_call_fast_path: isync mtspr SPRD, r5 b 1f ;// Jump to exit point. - ;// Invalid system call, loop for debug. + ;// Check if this is PVR read (0x804). 5: - b 5b + cmpi cr0, r3, 0x804 + bne cr0, 6f + mfspr r3, PVR + b 1f ;// Jump to exit point. + ;// Invalid system call, loop for debug. +6: + b 6b 1: rfid ;// Return from interrupt. |
