diff options
Diffstat (limited to 'arch/parisc/kernel/head.S')
-rw-r--r-- | arch/parisc/kernel/head.S | 47 |
1 files changed, 9 insertions, 38 deletions
diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S index 28405edf8448..2b8738576ec2 100644 --- a/arch/parisc/kernel/head.S +++ b/arch/parisc/kernel/head.S | |||
@@ -224,8 +224,6 @@ stext_pdc_ret: | |||
224 | mtctl %r0,%cr12 | 224 | mtctl %r0,%cr12 |
225 | mtctl %r0,%cr13 | 225 | mtctl %r0,%cr13 |
226 | 226 | ||
227 | /* Prepare to RFI! Man all the cannons! */ | ||
228 | |||
229 | /* Initialize the global data pointer */ | 227 | /* Initialize the global data pointer */ |
230 | loadgp | 228 | loadgp |
231 | 229 | ||
@@ -254,46 +252,16 @@ $is_pa20: | |||
254 | $install_iva: | 252 | $install_iva: |
255 | mtctl %r10,%cr14 | 253 | mtctl %r10,%cr14 |
256 | 254 | ||
257 | #ifdef __LP64__ | 255 | b aligned_rfi /* Prepare to RFI! Man all the cannons! */ |
258 | b aligned_rfi | ||
259 | nop | 256 | nop |
260 | 257 | ||
261 | .align 256 | 258 | .align 128 |
262 | aligned_rfi: | 259 | aligned_rfi: |
263 | ssm 0,0 | 260 | pcxt_ssm_bug |
264 | nop /* 1 */ | ||
265 | nop /* 2 */ | ||
266 | nop /* 3 */ | ||
267 | nop /* 4 */ | ||
268 | nop /* 5 */ | ||
269 | nop /* 6 */ | ||
270 | nop /* 7 */ | ||
271 | nop /* 8 */ | ||
272 | #endif | ||
273 | |||
274 | #ifdef __LP64__ /* move to psw.h? */ | ||
275 | #define PSW_BITS PSW_Q+PSW_I+PSW_D+PSW_P+PSW_R | ||
276 | #else | ||
277 | #define PSW_BITS PSW_SM_Q | ||
278 | #endif | ||
279 | |||
280 | $rfi: | ||
281 | /* turn off troublesome PSW bits */ | ||
282 | rsm PSW_BITS,%r0 | ||
283 | 261 | ||
284 | /* kernel PSW: | 262 | rsm PSW_SM_QUIET,%r0 /* off troublesome PSW bits */ |
285 | * - no interruptions except HPMC and TOC (which are handled by PDC) | 263 | /* Don't need NOPs, have 8 compliant insn before rfi */ |
286 | * - Q bit set (IODC / PDC interruptions) | ||
287 | * - big-endian | ||
288 | * - virtually mapped | ||
289 | */ | ||
290 | load32 KERNEL_PSW,%r10 | ||
291 | mtctl %r10,%ipsw | ||
292 | 264 | ||
293 | /* Set the space pointers for the post-RFI world | ||
294 | ** Clear the two-level IIA Space Queue, effectively setting | ||
295 | ** Kernel space. | ||
296 | */ | ||
297 | mtctl %r0,%cr17 /* Clear IIASQ tail */ | 265 | mtctl %r0,%cr17 /* Clear IIASQ tail */ |
298 | mtctl %r0,%cr17 /* Clear IIASQ head */ | 266 | mtctl %r0,%cr17 /* Clear IIASQ head */ |
299 | 267 | ||
@@ -301,8 +269,11 @@ $rfi: | |||
301 | mtctl %r11,%cr18 /* IIAOQ head */ | 269 | mtctl %r11,%cr18 /* IIAOQ head */ |
302 | ldo 4(%r11),%r11 | 270 | ldo 4(%r11),%r11 |
303 | mtctl %r11,%cr18 /* IIAOQ tail */ | 271 | mtctl %r11,%cr18 /* IIAOQ tail */ |
272 | |||
273 | load32 KERNEL_PSW,%r10 | ||
274 | mtctl %r10,%ipsw | ||
304 | 275 | ||
305 | /* Jump to hyperspace */ | 276 | /* Jump through hyperspace to Virt Mode */ |
306 | rfi | 277 | rfi |
307 | nop | 278 | nop |
308 | 279 | ||