linux/arch/m68k/kernel/asm-offsets.c
Greg Ungerer d25ba98afc m68k: remove thread_info struct from thread struct
Currently on m68k we have a comeplete thread_info structure stored inside
of the thread_struct, and we also have it in the initial part of the kernel
stack. Mostly the code currently uses the one inside of the thread_struct,
only using the "task" pointer from the stack based one.

This is wasteful and confusing, we should only have the single instance of
thread_info inside the stack page. And this is the norm for all other
architectures.

This change makes m68k handle thread_info consistently on both MMU enabled
and non-MMU setups.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2011-12-24 21:47:56 +10:00

104 lines
3.8 KiB
C

/*
* This program is used to generate definitions needed by
* assembly language modules.
*
* We use the technique used in the OSF Mach kernel code:
* generate asm statements containing #defines,
* compile this file to assembler, and then extract the
* #defines from the assembly-language output.
*/
#define ASM_OFFSETS_C
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <linux/kbuild.h>
#include <asm/bootinfo.h>
#include <asm/irq.h>
#include <asm/amigahw.h>
#include <linux/font.h>
int main(void)
{
/* offsets into the task struct */
DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
DEFINE(TASK_MM, offsetof(struct task_struct, mm));
DEFINE(TASK_STACK, offsetof(struct task_struct, stack));
/* offsets into the thread struct */
DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp));
DEFINE(THREAD_USP, offsetof(struct thread_struct, usp));
DEFINE(THREAD_SR, offsetof(struct thread_struct, sr));
DEFINE(THREAD_FS, offsetof(struct thread_struct, fs));
DEFINE(THREAD_CRP, offsetof(struct thread_struct, crp));
DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0));
DEFINE(THREAD_FPREG, offsetof(struct thread_struct, fp));
DEFINE(THREAD_FPCNTL, offsetof(struct thread_struct, fpcntl));
DEFINE(THREAD_FPSTATE, offsetof(struct thread_struct, fpstate));
/* offsets into the thread_info struct */
DEFINE(TINFO_PREEMPT, offsetof(struct thread_info, preempt_count));
DEFINE(TINFO_FLAGS, offsetof(struct thread_info, flags));
/* offsets into the pt_regs */
DEFINE(PT_OFF_D0, offsetof(struct pt_regs, d0));
DEFINE(PT_OFF_ORIG_D0, offsetof(struct pt_regs, orig_d0));
DEFINE(PT_OFF_D1, offsetof(struct pt_regs, d1));
DEFINE(PT_OFF_D2, offsetof(struct pt_regs, d2));
DEFINE(PT_OFF_D3, offsetof(struct pt_regs, d3));
DEFINE(PT_OFF_D4, offsetof(struct pt_regs, d4));
DEFINE(PT_OFF_D5, offsetof(struct pt_regs, d5));
DEFINE(PT_OFF_A0, offsetof(struct pt_regs, a0));
DEFINE(PT_OFF_A1, offsetof(struct pt_regs, a1));
DEFINE(PT_OFF_A2, offsetof(struct pt_regs, a2));
DEFINE(PT_OFF_PC, offsetof(struct pt_regs, pc));
DEFINE(PT_OFF_SR, offsetof(struct pt_regs, sr));
/* bitfields are a bit difficult */
#ifdef CONFIG_COLDFIRE
DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, sr) - 2);
#else
DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, pc) + 4);
#endif
/* offsets into the irq_cpustat_t struct */
DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t, __softirq_pending));
/* signal defines */
DEFINE(LSIGSEGV, SIGSEGV);
DEFINE(LSEGV_MAPERR, SEGV_MAPERR);
DEFINE(LSIGTRAP, SIGTRAP);
DEFINE(LTRAP_TRACE, TRAP_TRACE);
#ifdef CONFIG_MMU
/* offsets into the bi_record struct */
DEFINE(BIR_TAG, offsetof(struct bi_record, tag));
DEFINE(BIR_SIZE, offsetof(struct bi_record, size));
DEFINE(BIR_DATA, offsetof(struct bi_record, data));
/* offsets into font_desc (drivers/video/console/font.h) */
DEFINE(FONT_DESC_IDX, offsetof(struct font_desc, idx));
DEFINE(FONT_DESC_NAME, offsetof(struct font_desc, name));
DEFINE(FONT_DESC_WIDTH, offsetof(struct font_desc, width));
DEFINE(FONT_DESC_HEIGHT, offsetof(struct font_desc, height));
DEFINE(FONT_DESC_DATA, offsetof(struct font_desc, data));
DEFINE(FONT_DESC_PREF, offsetof(struct font_desc, pref));
/* offsets into the custom struct */
DEFINE(CUSTOMBASE, &amiga_custom);
DEFINE(C_INTENAR, offsetof(struct CUSTOM, intenar));
DEFINE(C_INTREQR, offsetof(struct CUSTOM, intreqr));
DEFINE(C_INTENA, offsetof(struct CUSTOM, intena));
DEFINE(C_INTREQ, offsetof(struct CUSTOM, intreq));
DEFINE(C_SERDATR, offsetof(struct CUSTOM, serdatr));
DEFINE(C_SERDAT, offsetof(struct CUSTOM, serdat));
DEFINE(C_SERPER, offsetof(struct CUSTOM, serper));
DEFINE(CIAABASE, &ciaa);
DEFINE(CIABBASE, &ciab);
DEFINE(C_PRA, offsetof(struct CIA, pra));
DEFINE(ZTWOBASE, zTwoBase);
#endif
return 0;
}