include/asm/viking.h

1 /* SPDX-License-Identifier: GPL-2.0 */
18  * -----------------------------------------------------------
19  * |impl-vers| RSV |TC|AC|SP|BM|PC|MBM|SB|IC|DC|PSO|RSV|NF|ME|
20  * -----------------------------------------------------------
21  *  31     24 23-17 16 15 14 13 12 11  10  9  8  7  6-2  1  0
23  * TC: Tablewalk Cacheable -- 0 = Twalks are not cacheable in E-cache
24  *                            1 = Twalks are cacheable in E-cache
26  * GNU/Viking will only cache tablewalks in the E-cache (mxcc) if present
28  * for machines lacking an E-cache (ie. in MBUS mode) this bit must
31  * AC: Alternate Cacheable -- 0 = Passthru physical accesses not cacheable
35  * is present in the pte when the processor is in boot-mode or the
36  * access does not need pte's for translation (ie. pass-thru ASI's).
37  * "Cachable" is only referring to E-cache (if present) and not the
40  * SP: SnooP Enable -- 0 = bus snooping off, 1 = bus snooping on
44  * to work at all.  On non-mxcc GNU/Viking modules the split I/D
48  * not affect GNU/Viking store-buffer snoops, those happen if the
49  * store-buffer is enabled no matter what.
51  * BM: Boot Mode -- 0 = not in boot mode, 1 = in boot mode
53  * This indicates whether the GNU/Viking is in boot-mode or not,
54  * if it is then all instruction fetch physical addresses are
56  * GNU/Viking boot-mode does not affect data accesses.  Also,
60  * MBM: MBus Mode -- 0 = not in MBus mode, 1 = in MBus mode
63  * MBUS mode, the GNU/Viking lacks a GNU/MXCC E-cache.  If it is
66  * to either an GNU/MBUS (sun4m) or the packet-switched GNU/XBus (sun4d).
68  * SB: StoreBuffer enable -- 0 = store buffer off, 1 = store buffer on
72  * caches during that cycle.  If disabled, all stores operations
75  * IC: Instruction Cache -- 0 = off, 1 = on
76  * DC: Data Cache -- 0 = off, 1 = 0n
78  * These bits enable the on-cpu GNU/Viking split I/D caches.  Note,
82  * NF: No Fault -- 0 = faults generate traps, 1 = faults don't trap
83  * ME: MMU enable -- 0 = mmu not translating, 1 = mmu translating
98 #define VIKING_TCENABLE     0x00010000   /* Enable table-walks to be cached */
118 			     : /* no outputs */  in viking_flush_icache()
126 			     : /* no outputs */  in viking_flush_dcache()
134 			     : /* no outputs */  in viking_unlock_icache()
142 			     : /* no outputs */  in viking_unlock_dcache()
150 			     : /* no outputs */  in viking_set_bpreg()
172 	__asm__ __volatile__ ("ldda [%2] %3, %%g2\n\t"  in viking_get_dcache_ptag()
193 			      "bne 2f\n\t"  in viking_mxcc_turn_off_parity()
197 			      "sta %1, [%2] %4\n\t"  in viking_mxcc_turn_off_parity()
201 			      "2:\n\t"  in viking_mxcc_turn_off_parity()
203 			      "sta %1, [%2] %4\n"  in viking_mxcc_turn_off_parity()
219 	/* Probe all MMU entries. */  in viking_hwprobe()
220 	__asm__ __volatile__("lda [%1] %2, %0\n\t"  in viking_hwprobe()
227 	__asm__ __volatile__("lda [%1] %2, %0\n\t"  in viking_hwprobe()
237 	__asm__ __volatile__("lda [%1] %2, %0\n\t"  in viking_hwprobe()
247 	__asm__ __volatile__("lda [%1] %2, %0\n\t"  in viking_hwprobe()