| 26,6 → 26,8 |
|---|
| # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| |
| #include <arch/register.h> |
| |
| .text |
| |
| .global memcpy |
| 46,3 → 48,42 |
|---|
| br.call.sptk.many b0=printf |
| } |
| br halt |
| |
| /** Switch to userspace - low level code. |
| * |
| * @param in0 Userspace entry point address. |
| * @param in1 Userspace stack pointer address. |
| * @param in2 Userspace register stack pointer address. |
| * @param in3 Value to be stored in IPSR. |
| * @param in4 Value to be stored in RSC. |
| */ |
| .global switch_to_userspace |
| switch_to_userspace: |
| alloc loc0 = ar.pfs, 5, 3, 0, 0 |
| rsm (PSR_IC_MASK | PSR_I_MASK) /* disable interruption collection and interrupts */ |
| srlz.d ;; |
| srlz.i ;; |
| |
| mov cr.ipsr = in3 |
| mov cr.iip = in0 |
| mov r12 = in1 |
| |
| xor r1 = r1, r1 |
| |
| mov loc1 = cr.ifs |
| movl loc2 = PFM_MASK ;; |
| and loc1 = loc2, loc1 ;; |
| mov cr.ifs = loc1 ;; /* prevent decrementing BSP by rfi */ |
| |
| invala |
| |
| mov loc1 = ar.rsc ;; |
| and loc1 = ~3, loc1 ;; |
| mov ar.rsc = loc1 ;; /* put RSE into enforced lazy mode */ |
| |
| flushrs ;; |
| |
| mov ar.bspstore = in2 ;; |
| mov ar.rsc = in4 ;; |
| |
| rfi ;; |