diff options
| author | Helge Deller <deller@gmx.de> | 2023-09-07 08:03:35 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2023-09-07 09:12:20 +0200 |
| commit | eda205211a522312b667d5bd25d58bee8504c09e (patch) | |
| tree | 8ed50ebc650da10f6d74d7468c810fda7afbbf42 /arch/parisc | |
| parent | 70bd68d5b61a63f87b5e986d9100c8ce46c5df4d (diff) | |
| download | linux-eda205211a522312b667d5bd25d58bee8504c09e.tar.gz | |
parisc: BTLB: Clear possibly existing BTLB entries
Call PDC to remove all existing BTLB entries (which may exist from
some previous operating system runs) before switching to virtual mode.
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/kernel/head.S | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S index fd15fd4bbb61b..a171bf3c6b318 100644 --- a/arch/parisc/kernel/head.S +++ b/arch/parisc/kernel/head.S @@ -180,10 +180,10 @@ $pgt_fill_loop: std %dp,0x18(%r10) #endif -#ifdef CONFIG_64BIT - /* Get PDCE_PROC for monarch CPU. */ #define MEM_PDC_LO 0x388 #define MEM_PDC_HI 0x35C +#ifdef CONFIG_64BIT + /* Get PDCE_PROC for monarch CPU. */ ldw MEM_PDC_LO(%r0),%r3 ldw MEM_PDC_HI(%r0),%r10 depd %r10, 31, 32, %r3 /* move to upper word */ @@ -269,7 +269,17 @@ stext_pdc_ret: tovirt_r1 %r6 mtctl %r6,%cr30 /* restore task thread info */ #endif - + +#ifndef CONFIG_64BIT + /* clear all BTLBs */ + ldi PDC_BLOCK_TLB,%arg0 + load32 PA(stext_pdc_btlb_ret), %rp + ldw MEM_PDC_LO(%r0),%r3 + bv (%r3) + ldi PDC_BTLB_PURGE_ALL,%arg1 +stext_pdc_btlb_ret: +#endif + /* PARANOID: clear user scratch/user space SR's */ mtsp %r0,%sr0 mtsp %r0,%sr1 |