trampoline.S revision 1.1
1 | 2 | copy binary image and execute 3 | 4 | written by Yasha (ITOH Yasufumi) 5 | public domain 6 | 7 | $NetBSD: trampoline.S,v 1.1 1998/09/01 19:55:33 itohy Exp $ 8 9 #include <machine/asm.h> 10 #include "trampoline.h" 11 12 | arg+0 bsr trampoline 13 | +4 a3+0 temporary stack address 14 | +8 a3+4 processor type 15 | +12 a3+8 struct execkern_arg 16 | +52 trampoline 17 18 ENTRY_NOPROFILE(trampoline) 19 oriw #0x0700,sr | keep out interrupts 20 21 moveal sp@+,a3 22 moveal a3@+,sp | set temporary stack 23 24 movel a3@+,d2 | MPU type 25 26 | 27 | turn off MMU 28 | 29 moveq #MPU_68030,d0 30 cmpl d2,d0 31 bccs Lmmu030 32 | 040/060 33 moveq #0,d0 34 .long 0x4E7B0003 | movec d0,tc 35 .long 0x4E7B0004 | movec d0,itt0 36 .long 0x4E7B0005 | movec d0,itt1 37 .long 0x4E7B0006 | movec d0,dtt0 38 .long 0x4E7B0007 | movec d0,dtt1 39 .long 0x4E7B0806 | movec d0,urp 40 .long 0x4E7B0807 | movec d0,srp 41 bras Lmmudone 42 Lmmu030: 43 | 020/030 44 clrl sp@- 45 .long 0xF0174000 | pmove sp@,tc 46 cmpl d0,d2 47 bnes Lmmu020 | 68851 has no tt regs 48 .long 0xF0170800 | pmove sp@,tt0 49 .long 0xF0170C00 | pmove sp@,tt1 50 Lmmu020: 51 movel #0x7fff0001,sp@- | null root pointer 52 .long 0xF0174C00 | pmove sp@,crp 53 .long 0xF0174800 | pmove sp@,srp 54 addql #8,sp 55 Lmmudone: 56 57 | minimize supervisor protection 58 clrb AREA_SET_REG 59 60 | reset VBR (for compatibility) 61 subal a1,a1 62 .long 0x4E7B9801 | movec a1,vbr 63 64 | then transfer and exec kernel 65 66 #define XK_NO_C_INTERFACE /* pass arg with a3 */ 67 #include "../common/execkern.S" 68 69 GLOBAL(end_trampoline) 70
Indexes created Mon Sep 29 21:09:56 GMT 2025