Commit fa6e0a63 authored by Richard Henderson's avatar Richard Henderson Committed by Richard Henderson
Browse files

target-alpha: Remap PIO space for 43-bit KSEG for EV6. 



Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent a3b9af16

target-alpha/helper.c

+7 −3
Original line number Diff line number Diff line
@@ -220,14 +220,18 @@ static int get_physical_address(CPUState *env, target_ulong addr, 


    /* Translate the superpage.  */

    /* ??? When we do more than emulate Unix PALcode, we'll need to

       determine which superpage is actually active.  */

    if (saddr < 0 && (saddr >> (TARGET_VIRT_ADDR_SPACE_BITS - 2) & 3) == 2) {

        /* User-space cannot access kseg addresses.  */

       determine which KSEG is actually active.  */

    if (saddr < 0 && ((saddr >> 41) & 3) == 2) {

        /* User-space cannot access KSEG addresses.  */

        if (mmu_idx != MMU_KERNEL_IDX) {

            goto exit;

        }



        /* For the benefit of the Typhoon chipset, move bit 40 to bit 43.

           We would not do this if the 48-bit KSEG is enabled.  */

        phys = saddr & ((1ull << 40) - 1);

        phys |= (saddr & (1ull << 40)) << 3;



        prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;

        ret = -1;

        goto exit;