RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 18:28:12 +00:00
Code Issues Activity Actions

Kernel: Use Processor::wait_check in loops waiting for HW to respond

Browse source 
This gives the processor the hint that it is in a hot loop and allows us
to do other work in between
This commit is contained in:
Hendiadyoin1 2023-09-12 14:58:55 +02:00 • committed by Andrew Kaster
parent cbaa3465a8
commit a2810d3cf8
9 changed files with 31 additions and 36 deletions
Download patch file Download diff file Expand all files Collapse all files

12
Kernel/Net/Intel/E1000ENetworkAdapter.cpp
View file

@ -255,15 +255,9 @@ UNMAP_AFTER_INIT u32 E1000ENetworkAdapter::read_eeprom(u8 address)
VERIFY(m_has_eeprom);
u16 data = 0;
u32 tmp = 0;
if (m_has_eeprom) {
out32(REG_EEPROM, ((u32)address << 2) | 1);
while (!((tmp = in32(REG_EEPROM)) & (1 << 1)))
;
} else {
out32(REG_EEPROM, ((u32)address << 2) | 1);
while (!((tmp = in32(REG_EEPROM)) & (1 << 1)))
;
}
out32(REG_EEPROM, ((u32)address << 2) | 1);
while (!((tmp = in32(REG_EEPROM)) & (1 << 1)))
Processor::wait_check();
data = (tmp >> 16) & 0xffff;
return data;
}