WebSVN – HelenOS – Diff – /trunk/kernel/arch/sparc64/src/start.S



	 * Copy the bootinfo structure passed from the boot loader
	 * to the kernel bootinfo structure.
	 */
	mov %o1, %o2
	mov %o0, %o1
	sethi %hi(bootinfo), %o0
	call memcpy
	or %o0, %lo(bootinfo), %o0
 
	/*
	 * Switch to kernel trap table.
	 */
	sethi %hi(trap_table), %g1
	wrpr %g1, %lo(trap_table), %tba
 
	/* 
	 * Take over the DMMU by installing global locked
	 * TTE entry identically mapping the first 4M
	 * of memory.

#define SET_TLB_DATA(r1, r2, imm) \
	set TTE_L | TTE_CP | TTE_P | TTE_W | LMA | imm, %r1; \
	set PAGESIZE_4M, %r2; \
	sllx %r2, TTE_SIZE_SHIFT, %r2; \
	or %r1, %r2, %r1; \
	mov 1, %r2; \
	sllx %r2, TTE_V_SHIFT, %r2; \
	or %r1, %r2, %r1;
	
	! write DTLB data and install the kernel mapping
	SET_TLB_DATA(g1, g2, 0)			! use non-global mapping

	
	set kernel_image_start, %g5
	
	! write ITLB tag of context 1
	SET_TLB_TAG(g1, MEM_CONTEXT_TEMP)
	mov VA_DMMU_TAG_ACCESS, %g2
	stxa %g1, [%g2] ASI_IMMU
	flush %g5
 
	! write ITLB data and install the temporary mapping in context 1
	SET_TLB_DATA(g1, g2, 0)			! use non-global mapping
	stxa %g1, [%g0] ASI_ITLB_DATA_IN_REG		
	flush %g5
	
	! switch to context 1
	mov MEM_CONTEXT_TEMP, %g1
	stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi	! ASI_DMMU is correct here !!!
	flush %g5
	
	! demap context 0
	SET_TLB_DEMAP_CMD(g1, TLB_DEMAP_NUCLEUS)
	stxa %g0, [%g1] ASI_IMMU_DEMAP			
	flush %g5
	
	! write ITLB tag of context 0
	SET_TLB_TAG(g1, MEM_CONTEXT_KERNEL)
	mov VA_DMMU_TAG_ACCESS, %g2
	stxa %g1, [%g2] ASI_IMMU
	flush %g5
 
	! write ITLB data and install the permanent kernel mapping in context 0
	SET_TLB_DATA(g1, g2, 0)			! use non-global mapping

 
	! ensure nucleus mapping
	wrpr %g0, 1, %tl
 
	! set context 1 in the primary context register
	mov MEM_CONTEXT_TEMP, %g1
	stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi	! ASI_DMMU is correct here !!!
	flush %g5
 
	! demap context 1
	SET_TLB_DEMAP_CMD(g1, TLB_DEMAP_PRIMARY)

Rev 1868	Rev 1880
Line 74...	Line 74...
74	* Copy the bootinfo structure passed from the boot loader	74	* Copy the bootinfo structure passed from the boot loader
75	* to the kernel bootinfo structure.	75	* to the kernel bootinfo structure.
76	*/	76	*/
77	mov %o1, %o2	77	mov %o1, %o2
78	mov %o0, %o1	78	mov %o0, %o1
79	set bootinfo, %o0	79	sethi %hi(bootinfo), %o0
80	call memcpy	80	call memcpy
81	nop	81	or %o0, %lo(bootinfo), %o0
82		82
83	/*	83	/*
84	* Switch to kernel trap table.	84	* Switch to kernel trap table.
85	*/	85	*/
86	set trap_table, %g1	86	sethi %hi(trap_table), %g1
87	wrpr %g1, 0, %tba	87	wrpr %g1, %lo(trap_table), %tba
88		88
89	/*	89	/*
90	* Take over the DMMU by installing global locked	90	* Take over the DMMU by installing global locked
91	* TTE entry identically mapping the first 4M	91	* TTE entry identically mapping the first 4M
92	* of memory.	92	* of memory.
Line 118...	Line 118...
118	#define SET_TLB_DATA(r1, r2, imm) \	118	#define SET_TLB_DATA(r1, r2, imm) \
119	set TTE_L \| TTE_CP \| TTE_P \| TTE_W \| LMA \| imm, %r1; \	119	set TTE_L \| TTE_CP \| TTE_P \| TTE_W \| LMA \| imm, %r1; \
120	set PAGESIZE_4M, %r2; \	120	set PAGESIZE_4M, %r2; \
121	sllx %r2, TTE_SIZE_SHIFT, %r2; \	121	sllx %r2, TTE_SIZE_SHIFT, %r2; \
122	or %r1, %r2, %r1; \	122	or %r1, %r2, %r1; \
123	set 1, %r2; \	123	mov 1, %r2; \
124	sllx %r2, TTE_V_SHIFT, %r2; \	124	sllx %r2, TTE_V_SHIFT, %r2; \
125	or %r1, %r2, %r1;	125	or %r1, %r2, %r1;
126		126
127	! write DTLB data and install the kernel mapping	127	! write DTLB data and install the kernel mapping
128	SET_TLB_DATA(g1, g2, 0) ! use non-global mapping	128	SET_TLB_DATA(g1, g2, 0) ! use non-global mapping
Line 170...	Line 170...
170		170
171	set kernel_image_start, %g5	171	set kernel_image_start, %g5
172		172
173	! write ITLB tag of context 1	173	! write ITLB tag of context 1
174	SET_TLB_TAG(g1, MEM_CONTEXT_TEMP)	174	SET_TLB_TAG(g1, MEM_CONTEXT_TEMP)
175	set VA_DMMU_TAG_ACCESS, %g2	175	mov VA_DMMU_TAG_ACCESS, %g2
176	stxa %g1, [%g2] ASI_IMMU	176	stxa %g1, [%g2] ASI_IMMU
177	flush %g5	177	flush %g5
178		178
179	! write ITLB data and install the temporary mapping in context 1	179	! write ITLB data and install the temporary mapping in context 1
180	SET_TLB_DATA(g1, g2, 0) ! use non-global mapping	180	SET_TLB_DATA(g1, g2, 0) ! use non-global mapping
181	stxa %g1, [%g0] ASI_ITLB_DATA_IN_REG	181	stxa %g1, [%g0] ASI_ITLB_DATA_IN_REG
182	flush %g5	182	flush %g5
183		183
184	! switch to context 1	184	! switch to context 1
185	set MEM_CONTEXT_TEMP, %g1	185	mov MEM_CONTEXT_TEMP, %g1
186	stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi ! ASI_DMMU is correct here !!!	186	stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi ! ASI_DMMU is correct here !!!
187	flush %g5	187	flush %g5
188		188
189	! demap context 0	189	! demap context 0
190	SET_TLB_DEMAP_CMD(g1, TLB_DEMAP_NUCLEUS)	190	SET_TLB_DEMAP_CMD(g1, TLB_DEMAP_NUCLEUS)
191	stxa %g0, [%g1] ASI_IMMU_DEMAP	191	stxa %g0, [%g1] ASI_IMMU_DEMAP
192	flush %g5	192	flush %g5
193		193
194	! write ITLB tag of context 0	194	! write ITLB tag of context 0
195	SET_TLB_TAG(g1, MEM_CONTEXT_KERNEL)	195	SET_TLB_TAG(g1, MEM_CONTEXT_KERNEL)
196	set VA_DMMU_TAG_ACCESS, %g2	196	mov VA_DMMU_TAG_ACCESS, %g2
197	stxa %g1, [%g2] ASI_IMMU	197	stxa %g1, [%g2] ASI_IMMU
198	flush %g5	198	flush %g5
199		199
200	! write ITLB data and install the permanent kernel mapping in context 0	200	! write ITLB data and install the permanent kernel mapping in context 0
201	SET_TLB_DATA(g1, g2, 0) ! use non-global mapping	201	SET_TLB_DATA(g1, g2, 0) ! use non-global mapping
Line 208...	Line 208...
208		208
209	! ensure nucleus mapping	209	! ensure nucleus mapping
210	wrpr %g0, 1, %tl	210	wrpr %g0, 1, %tl
211		211
212	! set context 1 in the primary context register	212	! set context 1 in the primary context register
213	set MEM_CONTEXT_TEMP, %g1	213	mov MEM_CONTEXT_TEMP, %g1
214	stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi ! ASI_DMMU is correct here !!!	214	stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi ! ASI_DMMU is correct here !!!
215	flush %g5	215	flush %g5
216		216
217	! demap context 1	217	! demap context 1
218	SET_TLB_DEMAP_CMD(g1, TLB_DEMAP_PRIMARY)	218	SET_TLB_DEMAP_CMD(g1, TLB_DEMAP_PRIMARY)

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/sparc64/src/start.S – Rev 1868 → 1880