diff options
| author | Niek Linnenbank <nieklinnenbank@gmail.com> | 2020-03-30 13:18:58 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-03-30 13:18:58 +0100 |
| commit | 34d8df2a1d8cd9f24e29cc9b27c233da471b2ad1 (patch) | |
| tree | f0170a1dde9d2d55c9fba071328f52c693c225bb /hw | |
| parent | c251191eae40e0e26680d0d8a8a065735acadef8 (diff) | |
hw/misc/allwinner-h3-dramc: enforce 64-bit multiply when calculating row mirror address
The allwinner_h3_dramc_map_rows function simulates row addressing behavior
when bootloader software attempts to detect the amount of available SDRAM.
Currently the line that calculates the 64-bit address of the mirrored row
uses a signed 32-bit multiply operation that in theory could result in the
upper 32-bit be all 1s. This commit ensures that the row mirror address
is calculated using only 64-bit operations.
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20200323192944.5967-1-nieklinnenbank@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/misc/allwinner-h3-dramc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/hw/misc/allwinner-h3-dramc.c b/hw/misc/allwinner-h3-dramc.c index 2b5260260e..1d37cf422c 100644 --- a/hw/misc/allwinner-h3-dramc.c +++ b/hw/misc/allwinner-h3-dramc.c @@ -85,8 +85,8 @@ static void allwinner_h3_dramc_map_rows(AwH3DramCtlState *s, uint8_t row_bits, } else if (row_bits_actual) { /* Row bits not matching ram_size, install the rows mirror */ - hwaddr row_mirror = s->ram_addr + ((1 << (row_bits_actual + - bank_bits)) * page_size); + hwaddr row_mirror = s->ram_addr + ((1ULL << (row_bits_actual + + bank_bits)) * page_size); memory_region_set_enabled(&s->row_mirror_alias, true); memory_region_set_address(&s->row_mirror_alias, row_mirror); |