Skip to content

Commit

Permalink
Fix transmutes
Browse files Browse the repository at this point in the history 
Don't accidentally transmute from `&&Reg<_>` to `&Reg<_>`, and make
types in transmutes explicit to avoid such issues in future.
  • Loading branch information
@jannic
jannic committed May 24, 2024
1 parent a1b20f3 commit 7071a09
Showing 1 changed file with 18 additions and 25 deletions.
43 changes: 18 additions & 25 deletions rp2040-hal/src/gpio/pin/pin_sealed.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -43,8 +43,8 @@ macro_rules! accessor_fns {
unsafe {
let sio = &*$crate::pac::SIO::PTR;
match pin.bank {
DynBankId::Bank0 => &sio.[<gpio_ $reg:lower>](),
DynBankId::Qspi => core::mem::transmute(&sio.[<gpio_hi_ $reg:lower>]()),
DynBankId::Bank0 =>sio.[<gpio_ $reg:lower>](),
DynBankId::Qspi => core::mem::transmute::<&$crate::pac::sio::[<GPIO_HI_ $reg:upper>],&$crate::pac::sio::[<GPIO_ $reg:upper>]>(sio.[<gpio_hi_ $reg:lower>]()),
}
}
}
Expand All @@ -57,19 +57,11 @@ macro_rules! accessor_fns {
match pin.bank {
DynBankId::Bank0 => {
let gpio = unsafe { &*$crate::pac::IO_BANK0::PTR };
&gpio.gpio(usize::from(pin.num)).[<gpio_ $reg:lower>]()
gpio.gpio(usize::from(pin.num)).[<gpio_ $reg:lower>]()
}
DynBankId::Qspi => unsafe {
let qspi = &*$crate::pac::IO_QSPI::PTR;
match pin.num {
0 => core::mem::transmute(&qspi.gpio_qspisclk().[<gpio_ $reg:lower>]()),
1 => core::mem::transmute(&qspi.gpio_qspiss().[<gpio_ $reg:lower>]()),
2 => core::mem::transmute(&qspi.gpio_qspisd0().[<gpio_ $reg:lower>]()),
3 => core::mem::transmute(&qspi.gpio_qspisd1().[<gpio_ $reg:lower>]()),
4 => core::mem::transmute(&qspi.gpio_qspisd2().[<gpio_ $reg:lower>]()),
5 => core::mem::transmute(&qspi.gpio_qspisd3().[<gpio_ $reg:lower>]()),
_ => unreachable!("Invalid QSPI bank pin number."),
}
core::mem::transmute::<&$crate::pac::io_qspi::gpio_qspi::[<GPIO_ $reg:upper>], &$crate::pac::io_bank0::gpio::[<GPIO_ $reg:upper>]>(qspi.gpio_qspi(usize::from(pin.num)).[<gpio_ $reg:lower>]())
},
}
}
Expand All @@ -86,14 +78,14 @@ macro_rules! accessor_fns {
let bank = &*$crate::pac::IO_BANK0::PTR;
match proc {
CoreId::Core0 => bank.[<proc0_ $reg:lower>](usize::from(index)),
CoreId::Core1 => core::mem::transmute(&bank.[<proc1_ $reg:lower>](usize::from(index))),
CoreId::Core1 => core::mem::transmute::<&$crate::pac::io_bank0::[<PROC1_ $reg:upper>], &$crate::pac::io_bank0::[<PROC0_ $reg:upper>]>(bank.[<proc1_ $reg:lower>](usize::from(index))),
}
}
DynBankId::Qspi => {
let bank = &*$crate::pac::IO_QSPI::PTR;
match proc {
CoreId::Core0 => core::mem::transmute(&bank.[<proc0_ $reg:lower>]()),
CoreId::Core1 => core::mem::transmute(&bank.[<proc1_ $reg:lower>]()),
CoreId::Core0 => core::mem::transmute::<&$crate::pac::io_qspi::[<PROC0_ $reg:upper>], &$crate::pac::io_bank0::[<PROC0_ $reg:upper>]>(bank.[<proc0_ $reg:lower>]()),
CoreId::Core1 => core::mem::transmute::<&$crate::pac::io_qspi::[<PROC1_ $reg:upper>], &$crate::pac::io_bank0::[<PROC0_ $reg:upper>]>(bank.[<proc1_ $reg:lower>]()),
}
}
};
Expand All @@ -115,7 +107,7 @@ macro_rules! accessor_fns {
}
DynBankId::Qspi => {
let bank = &*$crate::pac::IO_QSPI::PTR;
core::mem::transmute(&bank.[< dormant_wake_ $reg:lower>]())
core::mem::transmute::<&$crate::pac::io_qspi::[< DORMANT_WAKE_ $reg:upper >], &$crate::pac::io_bank0::[< DORMANT_WAKE_ $reg:upper >]>(bank.[< dormant_wake_ $reg:lower>]())
}
};
(reg, usize::from(offset))
Expand All @@ -140,13 +132,14 @@ where
}
DynBankId::Qspi => unsafe {
let qspi = &*pac::PADS_QSPI::PTR;
use rp2040_pac::{generic::Reg, pads_bank0, pads_qspi};
match pin.num {
0 => core::mem::transmute(&qspi.gpio_qspi_sclk()),
1 => core::mem::transmute(&qspi.gpio_qspi_ss()),
2 => core::mem::transmute(&qspi.gpio_qspi_sd0()),
3 => core::mem::transmute(&qspi.gpio_qspi_sd1()),
4 => core::mem::transmute(&qspi.gpio_qspi_sd2()),
5 => core::mem::transmute(&qspi.gpio_qspi_sd3()),
0 => core::mem::transmute::<&Reg<pads_qspi::gpio_qspi_sclk::GPIO_QSPI_SCLK_SPEC>, &Reg<pads_bank0::gpio::GPIO_SPEC>>(qspi.gpio_qspi_sclk()),
1 => core::mem::transmute::<&Reg<pads_qspi::gpio_qspi_ss::GPIO_QSPI_SS_SPEC>, &Reg<pads_bank0::gpio::GPIO_SPEC>>(qspi.gpio_qspi_ss()),
2 => core::mem::transmute::<&Reg<pads_qspi::gpio_qspi_sd0::GPIO_QSPI_SD0_SPEC>, &Reg<pads_bank0::gpio::GPIO_SPEC>>(qspi.gpio_qspi_sd0()),
3 => core::mem::transmute::<&Reg<pads_qspi::gpio_qspi_sd1::GPIO_QSPI_SD1_SPEC>, &Reg<pads_bank0::gpio::GPIO_SPEC>>(qspi.gpio_qspi_sd1()),
4 => core::mem::transmute::<&Reg<pads_qspi::gpio_qspi_sd2::GPIO_QSPI_SD2_SPEC>, &Reg<pads_bank0::gpio::GPIO_SPEC>>(qspi.gpio_qspi_sd2()),
5 => core::mem::transmute::<&Reg<pads_qspi::gpio_qspi_sd3::GPIO_QSPI_SD3_SPEC>, &Reg<pads_bank0::gpio::GPIO_SPEC>>(qspi.gpio_qspi_sd3()),
_ => unreachable!("Invalid QSPI bank pin number."),
}
},
Expand All @@ -165,13 +158,13 @@ where
accessor_fns!(sio oe_clr);
accessor_fns!(sio oe_xor);

fn proc_in_by_pass(&self) -> &crate::pac::syscfg::PROC_IN_SYNC_BYPASS {
fn proc_in_by_pass(&self) -> &pac::syscfg::PROC_IN_SYNC_BYPASS {
let pin = self.as_dyn();
unsafe {
let syscfg = &*pac::SYSCFG::PTR;
match pin.bank {
DynBankId::Bank0 => syscfg.proc_in_sync_bypass(),
DynBankId::Qspi => core::mem::transmute(&syscfg.proc_in_sync_bypass_hi()),
DynBankId::Qspi => core::mem::transmute::<&pac::syscfg::PROC_IN_SYNC_BYPASS_HI, &pac::syscfg::PROC_IN_SYNC_BYPASS>(syscfg.proc_in_sync_bypass_hi()),
}
}
}
Expand All @@ -187,7 +180,7 @@ where
}
DynBankId::Qspi => {
let bank = &*pac::IO_QSPI::PTR;
core::mem::transmute(&bank.intr())
core::mem::transmute::<&pac::io_qspi::INTR, &pac::io_bank0::INTR>(bank.intr())
}
};

Expand Down

0 comments on commit 7071a09

Please sign in to comment.