Subversion Repositories HelenOS

Rev

Rev 1856 | Rev 1864 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 1856 Rev 1860
Line 26... Line 26...
26 
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 26 
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
#
 27 
#
28 
 
 28 
 
29 
#include <arch/stack.h>
 29 
#include <arch/stack.h>
30 
#include <arch/regdef.h>
 30 
#include <arch/regdef.h>
- 
 
 31 
#include <arch/mm/mmu.h>
31 
 
 32 
 
32 
.text
 33 
.text
33 
 
 34 
 
34 
.global memcpy
 35 
.global memcpy
35 
.global memcpy_from_uspace
 36 
.global memcpy_from_uspace
Line 141... Line 142...
141 
	WRITE_ALTERNATE_REGISTER %g6, PSTATE_IG_BIT
 142 
	WRITE_ALTERNATE_REGISTER %g6, PSTATE_IG_BIT
142 
 
 143 
 
143 
.global read_from_ag_g7
 144 
.global read_from_ag_g7
144 
read_from_ag_g7:
 145 
read_from_ag_g7:
145 
	READ_ALTERNATE_REGISTER %g7, PSTATE_AG_BIT
 146 
	READ_ALTERNATE_REGISTER %g7, PSTATE_AG_BIT
- 
 
 147 
 
- 
 
 148 
 
- 
 
 149 
/** Switch to userspace.
- 
 
 150 
 *
- 
 
 151 
 * %o0	Userspace entry address.
- 
 
 152 
 * %o1	Userspace stack pointer address.
- 
 
 153 
 */
- 
 
 154 
.global switch_to_userspace
- 
 
 155 
switch_to_userspace:
- 
 
 156 
	flushw
- 
 
 157 
	wrpr %g0, 0, %cleanwin		! avoid information leak
- 
 
 158 
	save %o1, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
- 
 
 159 
 
- 
 
 160 
	clr %i2
- 
 
 161 
	clr %i3
- 
 
 162 
	clr %i4
- 
 
 163 
	clr %i5
- 
 
 164 
	clr %i6
- 
 
 165 
 
- 
 
 166 
	wrpr %g0, 1, %tl		! enforce mapping via nucleus
- 
 
 167 
 
- 
 
 168 
	rdpr %cwp, %g1
- 
 
 169 
	wrpr %g1, TSTATE_IE_BIT, %tstate
- 
 
 170 
	wrpr %i0, 0, %tnpc
- 
 
 171
- 
 
 172 
	/*
- 
 
 173 
	 * Set primary context according to secondary context.
- 
 
 174 
	 * Secondary context has been already installed by
- 
 
 175 
	 * higher-level functions.
- 
 
 176 
	 */
- 
 
 177 
	wr %g0, ASI_DMMU, %asi
- 
 
 178 
	ldxa [VA_SECONDARY_CONTEXT_REG] %asi, %g1
- 
 
 179 
	stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi
- 
 
 180 
	flush %i7
- 
 
 181
- 
 
 182 
	done				! jump to userspace