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scripts: gen_mmu: Rectified MMU page table generation.

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The script failed on certain corner cases. Whenever the memory region
was falling on the PDE boundary, the glitch was causing incorrect
PTE to be generated.

JIRA: ZEP-2328

Signed-off-by: Adithya Baglody <adithya.nagaraj.baglody@intel.com>
This commit is contained in:
Adithya Baglody 2017-07-01 13:23:58 +05:30 • committed by Anas Nashif
commit 5ffffb86bf
1 changed files with 28 additions and 27 deletions
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3
scripts/gen_mmu.py
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@ -132,7 +132,7 @@ def read_mmu_list_marshal_param():
# in case where it overflows the currenty PDE's range then limit the
# PTE to 1024 and so make the mem_size reflect the actual size taken up
# in the current PDE
if (region[1] + (pte_valid_addr_start * 4096) ) > (1024*4096):
if (region[1] + (pte_valid_addr_start * 4096) ) >= (1024*4096):
pte_valid_addr_end = 1024
mem_size = ( (pte_valid_addr_end - pte_valid_addr_start)*4096)
@ -157,6 +157,7 @@ def read_mmu_list_marshal_param():
# create all the extra PDEs needed to fit the requested size
# this loop starts from the current pde till the last pde that is needed
# the last pde is calcualted as the (start_addr + size) >> 22
if overflow_size !=0:
for extra_pde in range(pde_index+1, get_pde_number(
region[0] + region[1])+1):