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original_kernel/include/asm-sh/entry-macros.S

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sh: Add SH-2A platform headers. Mostly SH-2 wrappers.. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-05 15:18:08 +08:00
! entry.S macro define
.macro cli
stc sr, r0
or #0xf0, r0
ldc r0, sr
.endm
.macro sti
mov #0xf0, r11
extu.b r11, r11
not r11, r11
stc sr, r10
and r11, r10
#ifdef CONFIG_HAS_SR_RB
stc k_g_imask, r11
or r11, r10
#endif
ldc r10, sr
.endm
.macro get_current_thread_info, ti, tmp
#ifdef CONFIG_HAS_SR_RB
stc r7_bank, \ti
#else
sh: Fixup various PAGE_SIZE == 4096 assumptions. There were a number of places that made evil PAGE_SIZE == 4k assumptions that ended up breaking when trying to play with 8k and 64k page sizes, this fixes those up. The most significant change is the way we load THREAD_SIZE, previously this was done via: mov #(THREAD_SIZE >> 8), reg shll8 reg to avoid a memory access and allow the immediate load. With a 64k PAGE_SIZE, we're out of range for the immediate load size without resorting to special instructions available in later ISAs (movi20s and so on). The "workaround" for this is to bump up the shift to 10 and insert a shll2, which gives a bit more flexibility while still being much cheaper than a memory access. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-27 11:06:26 +08:00
mov #((THREAD_SIZE - 1) >> 10) ^ 0xff, \tmp
sh: Add SH-2A platform headers. Mostly SH-2 wrappers.. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-05 15:18:08 +08:00
shll8 \tmp
sh: Fixup various PAGE_SIZE == 4096 assumptions. There were a number of places that made evil PAGE_SIZE == 4k assumptions that ended up breaking when trying to play with 8k and 64k page sizes, this fixes those up. The most significant change is the way we load THREAD_SIZE, previously this was done via: mov #(THREAD_SIZE >> 8), reg shll8 reg to avoid a memory access and allow the immediate load. With a 64k PAGE_SIZE, we're out of range for the immediate load size without resorting to special instructions available in later ISAs (movi20s and so on). The "workaround" for this is to bump up the shift to 10 and insert a shll2, which gives a bit more flexibility while still being much cheaper than a memory access. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-27 11:06:26 +08:00
shll2 \tmp
sh: Add SH-2A platform headers. Mostly SH-2 wrappers.. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-05 15:18:08 +08:00
mov r15, \ti
and \tmp, \ti
#endif
.endm