From fdb98c258f56c8fbdc28e256ed3edab0bf47009b Mon Sep 17 00:00:00 2001 From: Amaury Pouly Date: Wed, 18 Jan 2017 14:39:03 +0100 Subject: hwstub/jz4760b: add lua code to probe for ei/di and ext instructions Add lua code to check whether ei/di and ext instructions are supported. This is unclear since xburst is somewhere between mips32r1 and mips32r2. Details results are below, but in summary: they don't work (ei has no effect, di/ext cause illegal instruction exceptions) > ./hwstub_shell -q -b -e 'require("jz/misc"); JZ.misc.enable_sram()' \ -f lua/xburst.lua -e "XBURST.test_ext_inst(0xb32d0000)" [...] Selecting soc jz4760b. Redirecting HW to hwstub.soc.jz4760b data: d7168acf error: lua/xburst.lua:209: call failed trapped exception in call > ./hwstub_shell -q -b -e 'require("jz/misc"); JZ.misc.enable_sram()' \ -f lua/xburst.lua -e "XBURST.test_ei_di_inst(0xb32d0000)" [...] Selecting soc jz4760b. Redirecting HW to hwstub.soc.jz4760b Testing ei Test SR Enable interrupts with CP0 SR: 0x1 Disable interrupts with CP0 SR: 0x0 Test ei/di Enable interrupts with ei SR: 0x0 Disable interrupts with di error: lua/xburst.lua:244: call failed trapped exception in call Change-Id: I2e162b5dd5e70488bcd8b58f3ca401a3ecab3c4b --- utils/hwstub/tools/lua/xburst.lua | 67 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) (limited to 'utils') diff --git a/utils/hwstub/tools/lua/xburst.lua b/utils/hwstub/tools/lua/xburst.lua index ddaf7fbc66..62e94faa7c 100644 --- a/utils/hwstub/tools/lua/xburst.lua +++ b/utils/hwstub/tools/lua/xburst.lua @@ -181,6 +181,73 @@ function XBURST.test_ebase(mem_addr) print(" Exception result: " .. XBURST.do_ebase_exc_test(mem_addr)) end +function XBURST.test_ext_inst(mem_addr) + data_addr = mem_addr + 0x80 + ----------- + -- test ext + ----------- + for pos = 0, 31 do + for size = 1, 32 - pos do + -- lui v0, + -- addiu v0,v0, + -- lw v1,0(v0) + DEV.write32(mem_addr + 0, 0x3c020000 + bit32.rshift(data_addr, 16)) + DEV.write32(mem_addr + 4, 0x8c430000 + bit32.band(data_addr, 0xffff)) + DEV.write32(mem_addr + 8, 0x8c430000) + -- ext v1, v1, pos, size + DEV.write32(mem_addr + 12, 0x7c630000 + bit32.rshift(size - 1, 11) + bit32.rshift(pos, 6)) + -- sw v1,0(v0) + DEV.write32(mem_addr + 16, 0xac430000) + -- jr ra + -- nop + DEV.write32(mem_addr + 20, 0x03e00008) + DEV.write32(mem_addr + 24, 0) + -- write some random data + data = math.random(0xffffffff) + print(string.format(" data: %x", data)) + DEV.write32(data_addr, data) + DEV.call(mem_addr) + ext_data = DEV.read32(data_addr) + print(string.format(" result: %x vs %x", ext_data, bit32.extract(data, pos, size))) + break + end + break + end +end + +function XBURST.test_ei_di_inst(mem_addr) + -- save SR and disable interrupts + old_sr = XBURST.read_cp0(12, 0) + XBURST.write_cp0(12, 0, bit32.replace(old_sr, 0, 0)) -- clear EI + print("Testing ei") + print(" Test SR") + print(" Enable interrupts with CP0") + XBURST.write_cp0(12, 0, bit32.replace(old_sr, 1, 0)) -- set EI + print(string.format(" SR: 0x%x", XBURST.read_cp0(12, 0))) + print(" Disable interrupts with CP0") + XBURST.write_cp0(12, 0, bit32.replace(old_sr, 0, 0)) -- clear EI + print(string.format(" SR: 0x%x", XBURST.read_cp0(12, 0))) + + print(" Test ei/di") + print(" Enable interrupts with ei") + -- ei + -- jr ra + -- nop + DEV.write32(mem_addr + 4, 0x41606020) + DEV.write32(mem_addr + 4, 0x03e00008) + DEV.write32(mem_addr + 8, 0) + DEV.call(mem_addr) + print(string.format(" SR: 0x%x", XBURST.read_cp0(12, 0))) + print(" Disable interrupts with di") + -- di + DEV.write32(mem_addr + 4, 0x41606000) + DEV.call(mem_addr) + print(string.format(" SR: 0x%x", XBURST.read_cp0(12, 0))) + + -- restore SR + XBURST.write_cp0(old_sr) +end + function XBURST.init() -- enable CP1 in SR sr_old = XBURST.read_cp0(12, 0) -- cgit v1.2.3