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#! /usr/sbin/dtrace -s

/*
 * showbootermemorymap - DTrace script that prints out the physical memory
 *                       map from EFI. Mimics the output format of the
 *                       kernel debugging macro of the same name.
 *
 * Amit Singh
 * http://osxbook.com
 */

#pragma D option quiet

BEGIN
{
    self->inited = 1;

    self->kgm_boot_args = ((struct boot_args*)(`PE_state).bootArgs);
    self->kgm_msize = self->kgm_boot_args->MemoryMapDescriptorSize;
    self->kgm_mcount = self->kgm_boot_args->MemoryMapSize / self->kgm_msize;

    printf("Type       Physical Start   Number of Pages\n");

    self->kgm_i = 0;
}

fbt:::entry
/self->inited && self->kgm_i < self->kgm_mcount/
{
    this->kgm_mptr = (struct EfiMemoryRange*)
    ((unsigned long)self->kgm_boot_args->MemoryMap +
                    self->kgm_i * self->kgm_msize);

    self->kgm_i++;

    printf("%s", (this->kgm_mptr->Type == 0)  ? "reserved  " :
                 (this->kgm_mptr->Type == 1)  ? "LoaderCode" :
                 (this->kgm_mptr->Type == 2)  ? "LoaderData" :
                 (this->kgm_mptr->Type == 3)  ? "BS_code   " :
                 (this->kgm_mptr->Type == 4)  ? "BS_data   " :
                 (this->kgm_mptr->Type == 5)  ? "RT_code   " :
                 (this->kgm_mptr->Type == 6)  ? "RT_data   " :
                 (this->kgm_mptr->Type == 7)  ? "available " :
                 (this->kgm_mptr->Type == 8)  ? "Unusable  " :
                 (this->kgm_mptr->Type == 9)  ? "ACPI_recl " :
                 (this->kgm_mptr->Type == 10) ? "ACPI_NVS  " :
                 (this->kgm_mptr->Type == 11) ? "MemMapIO  " :
                 (this->kgm_mptr->Type == 12) ? "MemPortIO " :
                 (this->kgm_mptr->Type == 13) ? "PAL_code  " :
                                                "UNKNOWN   ");
    printf(" %016llx %016llx\n",
           this->kgm_mptr->PhysicalStart, this->kgm_mptr->NumberOfPages);
}

fbt:::return
/self->inited && self->kgm_i >= self->kgm_mcount/
{
    exit(0);
}