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| author | Philippe Mathieu-Daudé <philmd@linaro.org> | 2025-01-13 12:35:33 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2025-01-13 12:35:33 +0000 |
| commit | afd757e46166afe86a6df4407b64203e53ea44f4 (patch) | |
| tree | a6ac8d65db1346a2fcac2b629b560bb00c3a3069 | |
| parent | 16e8c947bd6f741d328bb1521f62f69dccaa3fe1 (diff) | |
| download | qemu-afd757e46166afe86a6df4407b64203e53ea44f4.zip qemu-afd757e46166afe86a6df4407b64203e53ea44f4.tar.gz qemu-afd757e46166afe86a6df4407b64203e53ea44f4.tar.bz2 | |
tests/qtest/boot-serial-test: Reduce for() loop in PL011 tests
Since registers are not modified, we don't need
to refill their values. Directly jump to the previous
store instruction to keep filling the TXDAT register.
The equivalent C code remains:
while (true) {
*UART_DATA = 'T';
}
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | tests/qtest/boot-serial-test.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/tests/qtest/boot-serial-test.c b/tests/qtest/boot-serial-test.c index a71d285..553575c 100644 --- a/tests/qtest/boot-serial-test.c +++ b/tests/qtest/boot-serial-test.c @@ -70,18 +70,18 @@ static const uint8_t kernel_plml605[] = { }; static const uint8_t bios_raspi2[] = { - 0x08, 0x30, 0x9f, 0xe5, /* loop: ldr r3, [pc, #8] Get &UART0 */ + 0x08, 0x30, 0x9f, 0xe5, /* ldr r3, [pc, #8] Get &UART0 */ 0x54, 0x20, 0xa0, 0xe3, /* mov r2, #'T' */ - 0x00, 0x20, 0xc3, 0xe5, /* strb r2, [r3] *TXDAT = 'T' */ - 0xfb, 0xff, 0xff, 0xea, /* b -12 (loop) */ + 0x00, 0x20, 0xc3, 0xe5, /* loop: strb r2, [r3] *TXDAT = 'T' */ + 0xff, 0xff, 0xff, 0xea, /* b -4 (loop) */ 0x00, 0x10, 0x20, 0x3f, /* UART0: 0x3f201000 */ }; static const uint8_t kernel_aarch64[] = { - 0x81, 0x0a, 0x80, 0x52, /* loop: mov w1, #'T' */ + 0x81, 0x0a, 0x80, 0x52, /* mov w1, #'T' */ 0x02, 0x20, 0xa1, 0xd2, /* mov x2, #0x9000000 Load UART0 */ - 0x41, 0x00, 0x00, 0x39, /* strb w1, [x2] *TXDAT = 'T' */ - 0xfd, 0xff, 0xff, 0x17, /* b -12 (loop) */ + 0x41, 0x00, 0x00, 0x39, /* loop: strb w1, [x2] *TXDAT = 'T' */ + 0xff, 0xff, 0xff, 0x17, /* b -4 (loop) */ }; static const uint8_t kernel_nrf51[] = { |