2  * arch/sh/mm/tlb-sh5.c
4  * Copyright (C) 2003  Paul Mundt <lethal@linux-sh.org>
18  * sh64_tlb_init - Perform initial setup for the DTLB and ITLB.
23 	cpu_data->dtlb.entries	= 64;  in sh64_tlb_init()
24 	cpu_data->dtlb.step	= 0x10;  in sh64_tlb_init()
26 	cpu_data->dtlb.first	= DTLB_FIXED | cpu_data->dtlb.step;  in sh64_tlb_init()
27 	cpu_data->dtlb.next	= cpu_data->dtlb.first;  in sh64_tlb_init()
29 	cpu_data->dtlb.last	= DTLB_FIXED |  in sh64_tlb_init()
30 				  ((cpu_data->dtlb.entries - 1) *  in sh64_tlb_init()
31 				   cpu_data->dtlb.step);  in sh64_tlb_init()
34 	cpu_data->itlb.entries	= 64;  in sh64_tlb_init()
35 	cpu_data->itlb.step	= 0x10;  in sh64_tlb_init()
37 	cpu_data->itlb.first	= ITLB_FIXED | cpu_data->itlb.step;  in sh64_tlb_init()
38 	cpu_data->itlb.next	= cpu_data->itlb.first;  in sh64_tlb_init()
39 	cpu_data->itlb.last	= ITLB_FIXED |  in sh64_tlb_init()
40 				  ((cpu_data->itlb.entries - 1) *  in sh64_tlb_init()
41 				   cpu_data->itlb.step);  in sh64_tlb_init()
47  * sh64_next_free_dtlb_entry - Find the next available DTLB entry
51 	return cpu_data->dtlb.next;  in sh64_next_free_dtlb_entry()
55  * sh64_get_wired_dtlb_entry - Allocate a wired (locked-in) entry in the DTLB
61 	cpu_data->dtlb.first += cpu_data->dtlb.step;  in sh64_get_wired_dtlb_entry()
62 	cpu_data->dtlb.next  += cpu_data->dtlb.step;  in sh64_get_wired_dtlb_entry()
68  * sh64_put_wired_dtlb_entry - Free a wired (locked-in) entry in the DTLB.
93 		return -EINVAL;  in sh64_put_wired_dtlb_entry()
99 	if (entry < (cpu_data->dtlb.first - cpu_data->dtlb.step))  in sh64_put_wired_dtlb_entry()
100 		return -EINVAL;  in sh64_put_wired_dtlb_entry()
103 	cpu_data->dtlb.first	-= cpu_data->dtlb.step;  in sh64_put_wired_dtlb_entry()
104 	cpu_data->dtlb.next	= entry;  in sh64_put_wired_dtlb_entry()
110  * sh64_setup_tlb_slot - Load up a translation in a wired slot.
117  * Load up a virtual<->physical translation for @eaddr<->@paddr in the
118  * pre-allocated TLB slot @config_addr (see sh64_get_wired_dtlb_entry).
138  * sh64_teardown_tlb_slot - Teardown a translation.
178 	entry = dtlb_entries[dtlb_entry--];  in tlb_unwire_entry()
210 		tlbp = &cpu_data->itlb;  in __update_tlb()
212 		tlbp = &cpu_data->dtlb;  in __update_tlb()
214 	next = tlbp->next;  in __update_tlb()
221 	if (next > tlbp->last)  in __update_tlb()
222 		next = tlbp->first;  in __update_tlb()
223 	tlbp->next = next;  in __update_tlb()