1 /* This file is subject to the terms and conditions of the GNU General Public
2 * License. See the file "COPYING" in the main directory of this archive
5 * Copyright (C) 1999 by Helge Deller
6 * Copyright 1999 SuSE GmbH (Philipp Rumpf)
7 * Copyright 1999 Philipp Rumpf (prumpf@tux.org)
8 * Copyright 2000 Hewlett Packard (Paul Bame, bame@puffin.external.hp.com)
9 * Copyright (C) 2001 Grant Grundler (Hewlett Packard)
10 * Copyright (C) 2004 Kyle McMartin <kyle@debian.org>
12 * Initial Version 04-23-1999 by Helge Deller <deller@gmx.de>
15 #include <linux/autoconf.h> /* for CONFIG_SMP */
17 #include <asm/offsets.h>
21 #include <asm/assembly.h>
22 #include <asm/pgtable.h>
37 .import init_thread_union,data
38 .import fault_vector_20,code /* IVA parisc 2.0 32 bit */
40 .import fault_vector_11,code /* IVA parisc 1.1 32 bit */
41 .import $global$ /* forward declaration */
44 .export _stext,data /* Kernel want it this way! */
50 /* Make sure sr4-sr7 are set to zero for the kernel address space */
56 /* Clear BSS (shouldn't the boot loader do this?) */
58 .import __bss_start,data
59 .import __bss_stop,data
61 load32 PA(__bss_start),%r3
62 load32 PA(__bss_stop),%r4
64 cmpb,<<,n %r3,%r4,$bss_loop
67 /* Save away the arguments the boot loader passed in (32 bit args) */
68 load32 PA(boot_args),%r1
74 /* Initialize startup VM. Just map first 8 MB of memory */
79 shrd %r5,PxD_VALUE_SHIFT,%r3
81 shr %r1,PxD_VALUE_SHIFT,%r3
83 ldo (PxD_FLAG_PRESENT+PxD_FLAG_VALID)(%r3),%r3
85 load32 PA(swapper_pg_dir),%r4
86 mtctl %r4,%cr24 /* Initialize kernel root pointer */
87 mtctl %r4,%cr25 /* Initialize user root pointer */
90 stw %r3,ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4)
91 shrd %r1,PxD_VALUE_SHIFT,%r3
92 ldo (PxD_FLAG_PRESENT+PxD_FLAG_VALID)(%r3),%r3
93 ldo ASM_PMD_ENTRY*ASM_PMD_ENTRY_SIZE(%r5),%r5
95 ldo ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4),%r4
97 ldi ASM_PT_INITIAL,%r1
106 ldo (ASM_PAGE_SIZE >> PxD_VALUE_SHIFT)(%r3),%r3
110 ldo ASM_PMD_ENTRY_SIZE(%r5),%r5
112 ldo ASM_PGD_ENTRY_SIZE(%r4),%r4
115 ldo _PAGE_KERNEL(%r0),%r3 /* Hardwired 0 phys addr start */
119 STREGM %r3,ASM_PTE_ENTRY_SIZE(%r1)
120 ldo ASM_PAGE_SIZE(%r3),%r3
121 bb,>= %r3,31-KERNEL_INITIAL_ORDER,$pgt_fill_loop
124 /* Load the return address...er...crash 'n burn */
127 /* And the RFI Target address too */
128 load32 start_kernel,%r11
130 /* And the initial task pointer */
131 load32 init_thread_union,%r6
134 /* And the stack pointer too */
135 ldo THREAD_SZ_ALGN(%r6),%sp
137 /* And the interrupt stack */
138 load32 interrupt_stack,%r6
142 /* Set the smp rendevous address into page zero.
143 ** It would be safer to do this in init_smp_config() but
144 ** it's just way easier to deal with here because
145 ** of 64-bit function ptrs and the address is local to this file.
147 load32 PA(smp_slave_stext),%r10
148 stw %r10,0x10(%r0) /* MEM_RENDEZ */
149 stw %r0,0x28(%r0) /* MEM_RENDEZ_HI - assume addr < 4GB */
155 ** Code Common to both Monarch and Slave processors.
159 ** %r11 must contain RFI target address.
160 ** %r25/%r26 args to pass to target function
161 ** %r2 in case rfi target decides it didn't like something
164 ** %r3 PDCE_PROC address
165 ** %r11 RFI target address
167 ** Caller must init: SR4-7, %sp, %r10, %cr24/25,
173 /* Clear PDC entry point - we won't use it */
174 stw %r0,0x10(%r0) /* MEM_RENDEZ */
175 stw %r0,0x28(%r0) /* MEM_RENDEZ_HI */
176 #endif /*CONFIG_SMP*/
181 /* Save the rfi target address */
182 ldd TI_TASK-THREAD_SZ_ALGN(%sp), %r10
184 std %r11, TASK_PT_GR11(%r10)
185 /* Switch to wide mode Superdome doesn't support narrow PDC
188 1: mfia %rp /* clear upper part of pcoq */
194 /* Set Wide mode as the "Default" (eg for traps)
195 ** First trap occurs *right* after (or part of) rfi for slave CPUs.
196 ** Someday, palo might not do this for the Monarch either.
199 #define MEM_PDC_LO 0x388
200 #define MEM_PDC_HI 0x35C
201 ldw MEM_PDC_LO(%r0),%r3
202 ldw MEM_PDC_HI(%r0),%r6
203 depd %r6, 31, 32, %r3 /* move to upper word */
205 ldo PDC_PSW(%r0),%arg0 /* 21 */
206 ldo PDC_PSW_SET_DEFAULTS(%r0),%arg1 /* 2 */
207 ldo PDC_PSW_WIDE_BIT(%r0),%arg2 /* 2 */
208 load32 PA(stext_pdc_ret), %rp
213 /* restore rfi target address*/
214 ldd TI_TASK-THREAD_SZ_ALGN(%sp), %r10
216 ldd TASK_PT_GR11(%r10), %r11
220 /* PARANOID: clear user scratch/user space SR's */
226 /* Initialize Protection Registers */
232 /* Prepare to RFI! Man all the cannons! */
234 /* Initialize the global data pointer */
237 /* Set up our interrupt table. HPMCs might not work after this!
239 * We need to install the correct iva for PA1.1 or PA2.0. The
240 * following short sequence of instructions can determine this
241 * (without being illegal on a PA1.1 machine).
249 comib,<>,n 0,%r10,$is_pa20
250 ldil L%PA(fault_vector_11),%r10
252 ldo R%PA(fault_vector_11)(%r10),%r10
255 .level LEVEL /* restore 1.1 || 2.0w */
257 load32 PA(fault_vector_20),%r10
279 #ifdef __LP64__ /* move to psw.h? */
280 #define PSW_BITS PSW_Q+PSW_I+PSW_D+PSW_P+PSW_R
282 #define PSW_BITS PSW_SM_Q
286 /* turn off troublesome PSW bits */
290 * - no interruptions except HPMC and TOC (which are handled by PDC)
291 * - Q bit set (IODC / PDC interruptions)
295 load32 KERNEL_PSW,%r10
298 /* Set the space pointers for the post-RFI world
299 ** Clear the two-level IIA Space Queue, effectively setting
302 mtctl %r0,%cr17 /* Clear IIASQ tail */
303 mtctl %r0,%cr17 /* Clear IIASQ head */
305 /* Load RFI target into PC queue */
306 mtctl %r11,%cr18 /* IIAOQ head */
308 mtctl %r11,%cr18 /* IIAOQ tail */
310 /* Jump to hyperspace */
318 .import smp_init_current_idle_task,data
319 .import smp_callin,code
325 break 1,1 /* Break if returned from start_secondary */
331 /***************************************************************************
332 * smp_slave_stext is executed by all non-monarch Processors when the Monarch
333 * pokes the slave CPUs in smp.c:smp_boot_cpus().
335 * Once here, registers values are initialized in order to branch to virtual
336 * mode. Once all available/eligible CPUs are in virtual mode, all are
337 * released and start out by executing their own idle task.
338 *****************************************************************************/
344 ** Initialize Space registers
351 /* Initialize the SP - monarch sets up smp_init_current_idle_task */
352 load32 PA(smp_init_current_idle_task),%sp
353 LDREG 0(%sp),%sp /* load task address */
355 LDREG TASK_THREAD_INFO(%sp),%sp
356 mtctl %sp,%cr30 /* store in cr30 */
357 ldo THREAD_SZ_ALGN(%sp),%sp
359 /* point CPU to kernel page tables */
360 load32 PA(swapper_pg_dir),%r4
361 mtctl %r4,%cr24 /* Initialize kernel root pointer */
362 mtctl %r4,%cr25 /* Initialize user root pointer */
365 /* Setup PDCE_PROC entry */
368 /* Load RFI *return* address in case smp_callin bails */
369 load32 smp_callin_rtn,%r2
372 /* Load RFI target address. */
373 load32 smp_callin,%r11
375 /* ok...common code can handle the rest */
380 #endif /* CONFIG_SMP */
385 .export $global$,data
387 .type $global$,@object