We've currently got 18 architectures in QEMU, and thus 18 target-xxx
folders in the root folder of the QEMU source tree. More architectures
(e.g. RISC-V, AVR) are likely to be included soon, too, so the main
folder of the QEMU sources slowly gets quite overcrowded with the
target-xxx folders.
To disburden the main folder a little bit, let's move the target-xxx
folders into a dedicated target/ folder, so that target-xxx/ simply
becomes target/xxx/ instead.
Backports commit fcf5ef2ab52c621a4617ebbef36bf43b4003f4c0 from qemu
In OpenSPARC T1+ TWINX ASIs in store instructions are aliased
with Block Initializing Store ASIs.
"UltraSPARC T1 Supplement Draft D2.1, 14 May 2007" describes them
in the chapter "5.9 Block Initializing Store ASIs"
Integer stores of all sizes are allowed with these ASIs.
Backports commit 3390537b5df4014e24a30f9bdcfa05c2bd0cd6d8 from qemu
According to chapter 13.3 of the
UltraSPARC T1 Supplement to the UltraSPARC Architecture 2005,
only the sun4u format is available for data-access loads.
Store UA2005 entries in the sun4u format to simplify processing.
Backports commit 7285fba083de3f14f6e98abb4469173b56da9480 from qemu
Implement the behavior described in the chapter 13.9.11 of
UltraSPARC T1™ Supplement to the UltraSPARC Architecture 2005:
"If a TLB Data-In replacement is attempted with all TLB
entries locked and valid, the last TLB entry (entry 63) is
replaced."
Backports commit 4797a6851975c1239df440c5f01d8566e63717bb from qemu
Please note that QEMU doesn't impelement Real->Physical address
translation. The "Real Address" is always the "Physical Address".
Backports commit 84f8f5876628963e67f66edde8a71208c4274ac8 from qemu
Accordinf to UA2005, 9.3.3 "Address Space Identifiers",
"In hyperprivileged mode, all instruction fetches and loads and stores with implicit
ASIs use a physical address, regardless of the value of TL".
Backports commit 9a10756d1204c3528e47892195349bf882069846 from qemu
As described in Chapter 5.7.6 of the UltraSPARC Architecture 2005,
outstanding disrupting exceptions that are destined for privileged mode can only
cause a trap when the virtual processor is in nonprivileged or privileged mode and
PSTATE.ie = 1. At all other times, they are held pending.
Backports commit 1a2aefae6627170fdee689b394a65f76080c068a from qemu
Use explicit register pointers while accessing D/I-MMU registers.
Call cpu_unassigned_access on access to missing registers.
Backports commit 20395e63375358bf6dd147057aaf998abf7abdb9 from qemu
while IMMU/DMMU is disabled
- ignore MMU-faults in hypervisorv mode or if CPU doesn't have hypervisor
- signal TT_INSN_REAL_TRANSLATION_MISS/TT_DATA_REAL_TRANSLATION_MISS otherwise
Backports commit 1ceca928538a3633b74a7dc718a05ce6767f2f76 from qemu
We have never has the concept of global TLB entries which would avoid
the flush so we never actually use this flag. Drop it and make clear
that tlb_flush is the sledge-hammer it has always been.
Backports commit d10eb08f5d8389c814b554d01aa2882ac58221bf from qemu
Both the cpu->tb_jmp_cache and SoftMMU TLB structures are only used
when running TCG code so we might as well skip them for anything else.
Backports commit ba7d3d1858c257e39b47f7f12fa2016ffd960b11 from qemu
It is a common thing amongst the various cpu reset functions want to
flush the SoftMMU's TLB entries. This is done either by calling
tlb_flush directly or by way of a general memset of the CPU
structure (sometimes both).
This moves the tlb_flush call to the common reset function and
additionally ensures it is only done for the CONFIG_SOFTMMU case and
when tcg is enabled.
In some target cases we add an empty end_of_reset_fields structure to the
target vCPU structure so have a clear end point for any memset which
is resetting value in the structure before CPU_COMMON (where the TLB
structures are).
While this is a nice clean-up in general it is also a precursor for
changes coming to cputlb for MTTCG where the clearing of entries
can't be done arbitrarily across vCPUs. Currently the cpu_reset
function is usually called from the context of another vCPU as the
architectural power up sequence is run. By using the cputlb API
functions we can ensure the right behaviour in the future.
Backports commit 1f5c00cfdb8114c1e3a13426588ceb64f82c9ddb from qemu
On 680x0 family only.
Address Register indirect With postincrement:
When using the stack pointer (A7) with byte size data, the register
is incremented by two.
Address Register indirect With predecrement:
When using the stack pointer (A7) with byte size data, the register
is decremented by two.
Backports commit 727d937b59f1f722f983e20f9cd23b0e7ef60165 from qemu
gen_flush_flags() is setting unconditionally cc_op_synced to 1
and s->cc_op to CC_OP_FLAGS, whereas env->cc_op can be set
to something else by a previous tcg fragment.
We fix that by not setting cc_op_synced to 1
(except for gen_helper_flush_flags() that updates env->cc_op)
FIX: https://github.com/vivier/qemu-m68k/issues/19
Backports commit 695576db2daaf2bdc63e7f6d36038b61caed622a from qemu
M680x0 bit operations with an immediate value use 9 bits of the 16bit
value, while coldfire ones use only 8 bits.
Backports commit fe53c2be8c12da345bd788b949e0b2360e4b3db3 from qemu
In commit c52ab08aee6f7d4717fc6b517174043126bd302f,
the patch snippet for the "syscall" insn got applied to "iret".
Backports commit 410e98146ffde201ab4c778823ac8beaa74c4c3f from qemu
Particularly when andc is also available, this is two insns
shorter than using clz to compute ctz.
Backports commit 14e99210f6c6cede461a54b2e0f9b4cd55175f00 from qemu
The number of actual invocations of ctpop itself does not warrent
an opcode, but it is very helpful for POWER7 to use in generating
an expansion for ctz.
Backports commit a768e4e99247911f00c5c0267c12d4e207d5f6cc from qemu
