diff options
author | Suraj Jitindar Singh <sjitindarsingh@gmail.com> | 2017-07-03 16:19:46 +1000 |
---|---|---|
committer | David Gibson <david@gibson.dropbear.id.au> | 2017-07-11 11:04:02 +1000 |
commit | 6a042827b638dc73da6a72c72596f5be80bd4581 (patch) | |
tree | 636436a11a8a03b2bd69111d9b779769ca319661 /target/ppc/mmu-radix64.c | |
parent | 3340e5c4f28363348a0b3654624ff72ed14aa7cf (diff) |
target/ppc: Refactor tcg radix mmu code
The mmu-radix64.c file implements functions to enable the radix mmu
emulation in tcg mode. There is a function ppc_radix64_walk_tree() which
performs the radix tree walk and also implicitly checks the pte
protection.
Move the protection checking of the pte from the ppc_radix64_walk_tree()
function into the caller. This means the ppc_radix64_walk_tree() function
can be used without protection checking which is useful for debugging.
ppc_radix64_walk_tree() no longer needs to take the rwx and prot variables.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target/ppc/mmu-radix64.c')
-rw-r--r-- | target/ppc/mmu-radix64.c | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/target/ppc/mmu-radix64.c b/target/ppc/mmu-radix64.c index 69fde65276..1a650fd567 100644 --- a/target/ppc/mmu-radix64.c +++ b/target/ppc/mmu-radix64.c @@ -147,11 +147,10 @@ static void ppc_radix64_set_rc(PowerPCCPU *cpu, int rwx, uint64_t pte, } } -static uint64_t ppc_radix64_walk_tree(PowerPCCPU *cpu, int rwx, vaddr eaddr, +static uint64_t ppc_radix64_walk_tree(PowerPCCPU *cpu, vaddr eaddr, uint64_t base_addr, uint64_t nls, hwaddr *raddr, int *psize, - int *fault_cause, int *prot, - hwaddr *pte_addr) + int *fault_cause, hwaddr *pte_addr) { CPUState *cs = CPU(cpu); uint64_t index, pde; @@ -177,10 +176,6 @@ static uint64_t ppc_radix64_walk_tree(PowerPCCPU *cpu, int rwx, vaddr eaddr, uint64_t rpn = pde & R_PTE_RPN; uint64_t mask = (1UL << *psize) - 1; - if (ppc_radix64_check_prot(cpu, rwx, pde, fault_cause, prot)) { - return 0; /* Protection Denied Access */ - } - /* Or high bits of rpn and low bits to ea to form whole real addr */ *raddr = (rpn & ~mask) | (eaddr & mask); *pte_addr = base_addr + (index * sizeof(pde)); @@ -188,9 +183,8 @@ static uint64_t ppc_radix64_walk_tree(PowerPCCPU *cpu, int rwx, vaddr eaddr, } /* Next Level of Radix Tree */ - return ppc_radix64_walk_tree(cpu, rwx, eaddr, pde & R_PDE_NLB, - pde & R_PDE_NLS, raddr, psize, - fault_cause, prot, pte_addr); + return ppc_radix64_walk_tree(cpu, eaddr, pde & R_PDE_NLB, pde & R_PDE_NLS, + raddr, psize, fault_cause, pte_addr); } int ppc_radix64_handle_mmu_fault(PowerPCCPU *cpu, vaddr eaddr, int rwx, @@ -241,11 +235,11 @@ int ppc_radix64_handle_mmu_fault(PowerPCCPU *cpu, vaddr eaddr, int rwx, /* Walk Radix Tree from Process Table Entry to Convert EA to RA */ page_size = PRTBE_R_GET_RTS(prtbe0); - pte = ppc_radix64_walk_tree(cpu, rwx, eaddr & R_EADDR_MASK, + pte = ppc_radix64_walk_tree(cpu, eaddr & R_EADDR_MASK, prtbe0 & PRTBE_R_RPDB, prtbe0 & PRTBE_R_RPDS, - &raddr, &page_size, &fault_cause, &prot, - &pte_addr); - if (!pte) { + &raddr, &page_size, &fault_cause, &pte_addr); + if (!pte || ppc_radix64_check_prot(cpu, rwx, pte, &fault_cause, &prot)) { + /* Couldn't get pte or access denied due to protection */ ppc_radix64_raise_si(cpu, rwx, eaddr, fault_cause); return 1; } |