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atirage: Check both offset and size.

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When checking if a particular byte of a register is accessed, check both the starting position (offset) and ending position (offset + size) of the bytes being access.
This commit is contained in:
joevt 2024-02-27 02:56:18 -08:00 committed by dingusdev
parent 20b4a33c00
commit d4fa85688d
1 changed files with 3 additions and 3 deletions
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6
devices/video/atirage.cpp
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@ -221,7 +221,7 @@ uint32_t ATIRage::read_reg(uint32_t reg_offset, uint32_t size) {
switch (reg_num) {
case ATI_CLOCK_CNTL:
if ((offset + size - 1) >= 2) {
if (offset <= 2 && offset + size > 2) {
uint8_t pll_addr = extract_bits<uint64_t>(result, ATI_PLL_ADDR, ATI_PLL_ADDR_size);
insert_bits<uint64_t>(result, this->plls[pll_addr], ATI_PLL_DATA, ATI_PLL_DATA_size);
}
@ -313,7 +313,7 @@ void ATIRage::write_reg(uint32_t reg_offset, uint32_t value, uint32_t size) {
break;
case ATI_GP_IO:
new_value = value;
if (offset < 2 && (offset + size - 1) >= 1) {
if (offset <= 1 && offset + size > 1) {
uint8_t gpio_levels = (new_value >> 8) & 0xFFU;
gpio_levels = ((gpio_levels & 0x30) >> 3) | (gpio_levels & 1);
uint8_t gpio_dirs = (new_value >> 24) & 0xFFU;
@ -325,7 +325,7 @@ void ATIRage::write_reg(uint32_t reg_offset, uint32_t value, uint32_t size) {
break;
case ATI_CLOCK_CNTL:
new_value = value;
if ((offset + size - 1) >= 2 && bit_set(new_value, ATI_PLL_WR_EN)) {
if (offset <= 2 && offset + size > 2 && bit_set(new_value, ATI_PLL_WR_EN)) {
uint8_t pll_addr = extract_bits<uint32_t>(new_value, ATI_PLL_ADDR, ATI_PLL_ADDR_size);
uint8_t pll_data = extract_bits<uint32_t>(new_value, ATI_PLL_DATA, ATI_PLL_DATA_size);
this->plls[pll_addr] = pll_data;