3 * IA-64 Processor Programmers Reference Vol 2
5 * Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
6 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
7 * Copyright (C) 1999-2001, 2003 Hewlett-Packard Co
8 * David Mosberger <davidm@hpl.hp.com>
9 * Stephane Eranian <eranian@hpl.hp.com>
11 * 05/22/2000 eranian Added support for stacked register calls
12 * 05/24/2000 eranian Added support for physical mode static calls
15 #include <asm/asmmacro.h>
16 #include <asm/processor.h>
17 #include <asm/export.h>
21 data8 ia64_pal_default_handler
25 * Set the PAL entry point address. This could be written in C code, but we
26 * do it here to keep it all in one module (besides, it's so trivial that it's
29 * in0 Address of the PAL entry point (text address, NOT a function
32 GLOBAL_ENTRY(ia64_pal_handler_init)
33 alloc r3=ar.pfs,1,0,0,0
34 movl r2=pal_entry_point
38 END(ia64_pal_handler_init)
41 * Default PAL call handler. This needs to be coded in assembly because it
42 * uses the static calling convention, i.e., the RSE may not be used and
43 * calls are done via "br.cond" (not "br.call").
45 GLOBAL_ENTRY(ia64_pal_default_handler)
48 END(ia64_pal_default_handler)
51 * Make a PAL call using the static calling convention.
53 * in0 Index of PAL service
54 * in1 - in3 Remaining PAL arguments
56 GLOBAL_ENTRY(ia64_pal_call_static)
57 .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(4)
58 alloc loc1 = ar.pfs,4,5,0,0
59 movl loc2 = pal_entry_point
66 ld8 loc2 = [loc2] // loc2 <- entry point
68 mov loc4=ar.rsc // save RSE configuration
70 mov ar.rsc=0 // put RSE in enforced lazy, LE mode
84 mov ar.rsc = loc4 // restore RSE configuration
88 srlz.d // seralize restoration of psr.l
90 END(ia64_pal_call_static)
91 EXPORT_SYMBOL(ia64_pal_call_static)
94 * Make a PAL call using the stacked registers calling convention.
97 * in0 Index of PAL service
98 * in2 - in3 Remaining PAL arguments
100 GLOBAL_ENTRY(ia64_pal_call_stacked)
101 .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(4)
102 alloc loc1 = ar.pfs,4,4,4,0
103 movl loc2 = pal_entry_point
105 mov r28 = in0 // Index MUST be copied to r28
106 mov out0 = in0 // AND in0 of PAL function
110 ld8 loc2 = [loc2] // loc2 <- entry point
119 br.call.sptk.many rp=b7 // now make the call
120 .ret0: mov psr.l = loc3
124 srlz.d // serialize restoration of psr.l
126 END(ia64_pal_call_stacked)
127 EXPORT_SYMBOL(ia64_pal_call_stacked)
130 * Make a physical mode PAL call using the static registers calling convention.
133 * in0 Index of PAL service
134 * in2 - in3 Remaining PAL arguments
136 * PSR_LP, PSR_TB, PSR_ID, PSR_DA are never set by the kernel.
137 * So we don't need to clear them.
139 #define PAL_PSR_BITS_TO_CLEAR \
140 (IA64_PSR_I | IA64_PSR_IT | IA64_PSR_DT | IA64_PSR_DB | IA64_PSR_RT |\
141 IA64_PSR_DD | IA64_PSR_SS | IA64_PSR_RI | IA64_PSR_ED | \
142 IA64_PSR_DFL | IA64_PSR_DFH)
144 #define PAL_PSR_BITS_TO_SET \
148 GLOBAL_ENTRY(ia64_pal_call_phys_static)
149 .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(4)
150 alloc loc1 = ar.pfs,4,7,0,0
151 movl loc2 = pal_entry_point
153 mov r28 = in0 // copy procedure index
154 mov r8 = ip // save ip to compute branch
155 mov loc0 = rp // save rp
159 ld8 loc2 = [loc2] // loc2 <- entry point
160 mov r29 = in1 // first argument
161 mov r30 = in2 // copy arg2
162 mov r31 = in3 // copy arg3
164 mov loc3 = psr // save psr
165 adds r8 = 1f-1b,r8 // calculate return address for call
167 mov loc4=ar.rsc // save RSE configuration
168 dep.z loc2=loc2,0,61 // convert pal entry point to physical
169 tpa r8=r8 // convert rp to physical
171 mov b7 = loc2 // install target to branch reg
172 mov ar.rsc=0 // put RSE in enforced lazy, LE mode
173 movl r16=PAL_PSR_BITS_TO_CLEAR
174 movl r17=PAL_PSR_BITS_TO_SET
176 or loc3=loc3,r17 // add in psr the bits to set
178 andcm r16=loc3,r16 // removes bits to clear from psr
179 br.call.sptk.many rp=ia64_switch_mode_phys
180 mov rp = r8 // install return address (physical)
185 mov ar.rsc=0 // put RSE in enforced lazy, LE mode
186 mov r16=loc3 // r16= original psr
189 br.call.sptk.many rp=ia64_switch_mode_virt // return to virtual mode
190 mov psr.l = loc3 // restore init PSR
195 mov ar.rsc=loc4 // restore RSE configuration
196 srlz.d // seralize restoration of psr.l
198 END(ia64_pal_call_phys_static)
199 EXPORT_SYMBOL(ia64_pal_call_phys_static)
202 * Make a PAL call using the stacked registers in physical mode.
205 * in0 Index of PAL service
206 * in2 - in3 Remaining PAL arguments
208 GLOBAL_ENTRY(ia64_pal_call_phys_stacked)
209 .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(5)
210 alloc loc1 = ar.pfs,5,7,4,0
211 movl loc2 = pal_entry_point
213 mov r28 = in0 // copy procedure index
214 mov loc0 = rp // save rp
218 ld8 loc2 = [loc2] // loc2 <- entry point
219 mov loc3 = psr // save psr
221 mov loc4=ar.rsc // save RSE configuration
222 dep.z loc2=loc2,0,61 // convert pal entry point to physical
224 mov ar.rsc=0 // put RSE in enforced lazy, LE mode
225 movl r16=PAL_PSR_BITS_TO_CLEAR
226 movl r17=PAL_PSR_BITS_TO_SET
228 or loc3=loc3,r17 // add in psr the bits to set
229 mov b7 = loc2 // install target to branch reg
231 andcm r16=loc3,r16 // removes bits to clear from psr
232 br.call.sptk.many rp=ia64_switch_mode_phys
234 mov out0 = in0 // first argument
235 mov out1 = in1 // copy arg2
236 mov out2 = in2 // copy arg3
237 mov out3 = in3 // copy arg3
241 br.call.sptk.many rp=b7 // now make the call
243 mov ar.rsc=0 // put RSE in enforced lazy, LE mode
244 mov r16=loc3 // r16= original psr
247 br.call.sptk.many rp=ia64_switch_mode_virt // return to virtual mode
249 mov psr.l = loc3 // restore init PSR
253 mov ar.rsc=loc4 // restore RSE configuration
254 srlz.d // seralize restoration of psr.l
256 END(ia64_pal_call_phys_stacked)
257 EXPORT_SYMBOL(ia64_pal_call_phys_stacked)
260 * Save scratch fp scratch regs which aren't saved in pt_regs already
263 * NOTE: We need to do this since firmware (SAL and PAL) may use any of the
264 * scratch regs fp-low partition.
267 * in0 Address of stack storage for fp regs
269 GLOBAL_ENTRY(ia64_save_scratch_fpregs)
270 alloc r3=ar.pfs,1,0,0,0
273 stf.spill [in0] = f10,32
274 stf.spill [r2] = f11,32
276 stf.spill [in0] = f12,32
277 stf.spill [r2] = f13,32
279 stf.spill [in0] = f14,32
280 stf.spill [r2] = f15,32
282 END(ia64_save_scratch_fpregs)
283 EXPORT_SYMBOL(ia64_save_scratch_fpregs)
286 * Load scratch fp scratch regs (fp10-fp15)
289 * in0 Address of stack storage for fp regs
291 GLOBAL_ENTRY(ia64_load_scratch_fpregs)
292 alloc r3=ar.pfs,1,0,0,0
295 ldf.fill f10 = [in0],32
296 ldf.fill f11 = [r2],32
298 ldf.fill f12 = [in0],32
299 ldf.fill f13 = [r2],32
301 ldf.fill f14 = [in0],32
302 ldf.fill f15 = [r2],32
304 END(ia64_load_scratch_fpregs)
305 EXPORT_SYMBOL(ia64_load_scratch_fpregs)