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