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libcortex_a9: added L2 cache

This commit is contained in:
pca006132 2020-08-20 11:50:52 +08:00
parent b268fe015a
commit 283bc9b810
4 changed files with 371 additions and 3 deletions

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@ -12,4 +12,5 @@ default = ["target_zc706"]
[dependencies]
bit_field = "0.10"
volatile-register = "0.2"
libregister = { path = "../libregister" }

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@ -1,4 +1,5 @@
use super::asm::{dmb, dsb};
use super::l2c::*;
/// Invalidate TLBs
#[inline(always)]
@ -52,10 +53,9 @@ pub fn dccisw(setway: u32) {
}
}
/// A made-up "instruction": invalidate all of the L1 D-Cache
#[inline(always)]
pub fn dciall() {
pub fn dciall_l1() {
// the cache associativity could be read from a register, but will
// always be 4 in L1 data cache of a cortex a9
let ways = 4;
@ -80,9 +80,17 @@ pub fn dciall() {
}
}
/// A made-up "instruction": invalidate all of the L1 L2 D-Cache
#[inline(always)]
pub fn dciall() {
dmb();
l2_cache_invalidate_all();
dciall_l1();
}
/// A made-up "instruction": flush and invalidate all of the L1 D-Cache
#[inline(always)]
pub fn dcciall() {
pub fn dcciall_l1() {
// the cache associativity could be read from a register, but will
// always be 4 in L1 data cache of a cortex a9
let ways = 4;
@ -107,6 +115,15 @@ pub fn dcciall() {
}
}
#[inline(always)]
pub fn dcciall() {
dmb();
dcciall_l1();
dsb();
l2_cache_clean_invalidate_all();
dcciall_l1();
dsb();
}
const CACHE_LINE: usize = 0x20;
const CACHE_LINE_MASK: usize = CACHE_LINE - 1;
@ -145,7 +162,16 @@ pub fn dccimvac(addr: usize) {
/// Data cache clean and invalidate for an object.
pub fn dcci<T>(object: &T) {
// ref: L2C310 TRM 3.3.10
dmb();
for addr in object_cache_line_addrs(object) {
dccmvac(addr);
}
dsb();
for addr in object_cache_line_addrs(object) {
l2_cache_clean_invalidate(addr);
}
l2_cache_sync();
for addr in object_cache_line_addrs(object) {
dccimvac(addr);
}
@ -154,6 +180,14 @@ pub fn dcci<T>(object: &T) {
pub fn dcci_slice<T>(slice: &[T]) {
dmb();
for addr in slice_cache_line_addrs(slice) {
dccmvac(addr);
}
dsb();
for addr in slice_cache_line_addrs(slice) {
l2_cache_clean_invalidate(addr);
}
l2_cache_sync();
for addr in slice_cache_line_addrs(slice) {
dccimvac(addr);
}
@ -175,17 +209,28 @@ pub fn dcc<T>(object: &T) {
dccmvac(addr);
}
dsb();
for addr in object_cache_line_addrs(object) {
l2_cache_clean(addr);
}
l2_cache_sync();
}
/// Data cache clean for an object. Panics if not properly
/// aligned and properly sized to be contained in an exact number of
/// cache lines.
pub fn dcc_slice<T>(slice: &[T]) {
if slice.len() == 0 {
return;
}
dmb();
for addr in slice_cache_line_addrs(slice) {
dccmvac(addr);
}
dsb();
for addr in slice_cache_line_addrs(slice) {
l2_cache_clean(addr);
}
l2_cache_sync();
}
/// Data cache invalidate by memory virtual address. This and
@ -205,6 +250,10 @@ pub unsafe fn dci<T>(object: &mut T) {
assert_eq!(beyond_addr & CACHE_LINE_MASK, 0, "dci object beyond_addr must be aligned");
dmb();
for addr in (first_addr..beyond_addr).step_by(CACHE_LINE) {
l2_cache_invalidate(addr);
}
l2_cache_sync();
for addr in (first_addr..beyond_addr).step_by(CACHE_LINE) {
dcimvac(addr);
}
@ -219,6 +268,10 @@ pub unsafe fn dci_slice<T>(slice: &mut [T]) {
assert_eq!(beyond_addr & CACHE_LINE_MASK, 0, "dci slice beyond_addr must be aligned");
dmb();
for addr in (first_addr..beyond_addr).step_by(CACHE_LINE) {
l2_cache_invalidate(addr);
}
l2_cache_sync();
for addr in (first_addr..beyond_addr).step_by(CACHE_LINE) {
dcimvac(addr);
}

313
libcortex_a9/src/l2c.rs Normal file
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@ -0,0 +1,313 @@
use libregister::{register, register_at, register_bit, register_bits, RegisterRW, RegisterR, RegisterW};
use super::asm::dmb;
use volatile_register::RW;
pub fn enable_l2_cache() {
dmb();
let regs = RegisterBlock::new();
// disable L2 cache
regs.reg1_control.modify(|_, w| w.l2_enable(false));
regs.reg1_aux_control.modify(|_, w| {
w.early_bresp_en(true)
.instr_prefetch_en(true)
.data_prefetch_en(true)
.cache_replace_policy(true)
.way_size(3)
});
regs.reg1_tag_ram_control.modify(|_, w| w.ram_wr_access_lat(1).ram_rd_access_lat(1).ram_setup_lat(1));
regs.reg1_data_ram_control.modify(|_, w| w.ram_wr_access_lat(1).ram_rd_access_lat(2).ram_setup_lat(1));
// invalidate L2 ways
unsafe {
regs.reg7_inv_way.write(0xFFFF);
}
// poll for completion
while regs.reg7_cache_sync.read().c() {}
// write to a magic memory location with a magic sequence
// required in UG585 Section 3.4.10 Initialization Sequence
unsafe {
core::ptr::write_volatile(0xF8000008usize as *mut u32, 0xDF0D);
core::ptr::write_volatile(0xF8000A1Cusize as *mut u32, 0x020202);
core::ptr::write_volatile(0xF8000004usize as *mut u32, 0x767B);
}
regs.reg1_control.modify(|_, w| w.l2_enable(true));
dmb();
}
#[inline(always)]
pub fn l2_cache_invalidate_all() {
let regs = RegisterBlock::new();
unsafe {
regs.reg7_inv_way.write(0xFFFF);
}
// poll for completion
while regs.reg7_cache_sync.read().c() {}
}
#[inline(always)]
pub fn l2_cache_clean_all() {
let regs = RegisterBlock::new();
unsafe {
regs.reg7_clean_way.write(0xFFFF);
}
// poll for completion
while regs.reg7_cache_sync.read().c() {}
}
#[inline(always)]
pub fn l2_cache_clean_invalidate_all() {
let regs = RegisterBlock::new();
unsafe {
regs.reg7_clean_inv_way.write(0xFFFF);
}
// poll for completion
while regs.reg7_cache_sync.read().c() {}
}
/// L2 cache sync, similar to dsb for L1 cache
#[inline(always)]
pub fn l2_cache_sync() {
let regs = RegisterBlock::new();
regs.reg7_cache_sync.write(Reg7CacheSync::zeroed().c(false));
}
#[inline(always)]
pub fn l2_cache_clean(addr: usize) {
let regs = RegisterBlock::new();
unsafe {
regs.reg7_clean_pa.write(addr as u32);
}
}
#[inline(always)]
pub fn l2_cache_invalidate(addr: usize) {
let regs = RegisterBlock::new();
unsafe {
regs.reg7_inv_pa.write(addr as u32);
}
}
#[inline(always)]
pub fn l2_cache_clean_invalidate(addr: usize) {
let regs = RegisterBlock::new();
unsafe {
regs.reg7_clean_inv_pa.write(addr as u32);
}
}
#[repr(C)]
struct RegisterBlock {
/// cache ID register, Returns the 32-bit device ID code it reads off the CACHEID input bus.
/// The value is specified by the system integrator. Reset value: 0x410000c8
pub reg0_cache_id: Reg0CacheId,
/// cache type register, Returns the 32-bit cache type. Reset value: 0x1c100100
pub reg0_cache_type: Reg0CacheType,
unused0: [u32; 62],
/// control register, reset value: 0x0
pub reg1_control: Reg1Control,
/// auxilary control register, reset value: 0x02020000
pub reg1_aux_control: Reg1AuxControl,
/// Configures Tag RAM latencies
pub reg1_tag_ram_control: Reg1TagRamControl,
/// configures data RAM latencies
pub reg1_data_ram_control: Reg1DataRamControl,
unused1: [u32; 60],
/// Permits the event counters to be enabled and reset.
pub reg2_ev_counter_ctrl: Reg2EvCounterCtrl,
/// Enables event counter 1 to be driven by a specific event. Counter 1 increments when the
/// event occurs.
pub reg2_ev_counter1_cfg: Reg2EvCounter1Cfg,
/// Enables event counter 0 to be driven by a specific event. Counter 0 increments when the
/// event occurs.
pub reg2_ev_counter0_cfg: Reg2EvCounter0Cfg,
/// Enable the programmer to read off the counter value. The counter counts an event as
/// specified by the Counter Configuration Registers. The counter can be preloaded if counting
/// is disabled and reset by the Event Counter Control Register.
pub reg2_ev_counter1: RW<u32>,
/// Enable the programmer to read off the counter value. The counter counts an event as
/// specified by the Counter Configuration Registers. The counter can be preloaded if counting
/// is disabled and reset by the Event Counter Control Register.
pub reg2_ev_counter0: RW<u32>,
/// This register enables or masks interrupts from being triggered on the external pins of the
/// cache controller. Figure 3-8 on page 3-17 shows the register bit assignments. The bit
/// assignments enables the masking of the interrupts on both their individual outputs and the
/// combined L2CCINTR line. Clearing a bit by writing a 0, disables the interrupt triggering on
/// that pin. All bits are cleared by a reset. You must write to the register bits with a 1 to
/// enable the generation of interrupts. 1 = Enabled. 0 = Masked. This is the default.
pub reg2_int_mask: Reg2IntMask,
/// This register is a read-only.It returns the masked interrupt status. This register can be
/// accessed by secure and non-secure operations. The register gives an AND function of the raw
/// interrupt status with the values of the interrupt mask register. All the bits are cleared
/// by a reset. A write to this register is ignored. Bits read can be HIGH or LOW: HIGH If the
/// bits read HIGH, they reflect the status of the input lines triggering an interrupt. LOW If
/// the bits read LOW, either no interrupt has been generated, or the interrupt is masked.
pub reg2_int_mask_status: Reg2IntMaskStatus,
/// The Raw Interrupt Status Register enables the interrupt status that excludes the masking
/// logic. Bits read can be HIGH or LOW: HIGH If the bits read HIGH, they reflect the status of
/// the input lines triggering an interrupt. LOW If the bits read LOW, no interrupt has been
/// generated.
pub reg2_int_raw_status: Reg2IntRawStatus,
/// Clears the Raw Interrupt Status Register bits. When a bit is written as 1, it clears the
/// corresponding bit in the Raw Interrupt Status Register. When a bit is written as 0, it has
/// no effect
pub reg2_int_clear: Reg2IntClear,
unused2: [u32; 323],
/// Drain the STB. Operation complete when all buffers, LRB, LFB, STB, and EB, are empty
pub reg7_cache_sync: Reg7CacheSync,
unused3: [u32; 15],
/// Invalidate Line by PA: Specific L2 cache line is marked as not valid
pub reg7_inv_pa: RW<u32>,
unused4: [u32; 2],
/// Invalidate by Way Invalidate all data in specified ways, including dirty data. An
/// Invalidate by way while selecting all cache ways is equivalent to invalidating all cache
/// entries. Completes as a background task with the way, or ways, locked, preventing
/// allocation.
pub reg7_inv_way: RW<u32>,
unused5: [u32; 12],
/// Clean Line by PA Write the specific L2 cache line to L3 main memory if the line is marked
/// as valid and dirty. The line is marked as not dirty. The valid bit is unchanged
pub reg7_clean_pa: RW<u32>,
unused6: [u32; 1],
/// Clean Line by Set/Way Write the specific L2 cache line within the specified way to L3 main
/// memory if the line is marked as valid and dirty. The line is marked as not dirty. The valid
/// bit is unchanged
pub reg7_clean_index: Reg7CleanIndex,
/// Clean by Way Writes each line of the specified L2 cache ways to L3 main memory if the line
/// is marked as valid and dirty. The lines are marked as not dirty. The valid bits are
/// unchanged. Completes as a background task with the way, or ways, locked, preventing
/// allocation.
pub reg7_clean_way: RW<u32>,
unused7: [u32; 12],
/// Clean and Invalidate Line by PA Write the specific L2 cache line to L3 main memory if the
/// line is marked as valid and dirty. The line is marked as not valid
pub reg7_clean_inv_pa: RW<u32>,
unused8: [u32; 1],
/// Clean and Invalidate Line by Set/Way Write the specific L2 cache line within the specified
/// way to L3 main memory if the line is marked as valid and dirty. The line is marked as not
/// valid
pub reg7_clean_inv_index: Reg7CleanInvIndex,
/// Clean and Invalidate by Way Writes each line of the specified L2 cache ways to L3 main
/// memory if the line is marked as valid and dirty. The lines are marked as not valid.
/// Completes as a background task with the way, or ways, locked, preventing allocation.
pub reg7_clean_inv_way: RW<u32>,
}
register_at!(RegisterBlock, 0xF8F02000, new);
register!(reg0_cache_id, Reg0CacheId, RW, u32);
register_bits!(reg0_cache_id, implementer, u8, 24, 31);
register_bits!(reg0_cache_id, cache_id, u8, 10, 15);
register_bits!(reg0_cache_id, part_num, u8, 6, 9);
register_bits!(reg0_cache_id, rtl_release, u8, 0, 5);
register!(reg0_cache_type, Reg0CacheType, RW, u32);
register_bit!(reg0_cache_type, data_banking, 31);
register_bits!(reg0_cache_type, ctype, u8, 25, 28);
register_bit!(reg0_cache_type, h, 24);
register_bits!(reg0_cache_type, dsize_middsize_19, u8, 20, 22);
register_bit!(reg0_cache_type, l2_assoc_d, 18);
register_bits!(reg0_cache_type, l2cache_line_len_disize_11, u8, 12, 13);
register_bits!(reg0_cache_type, isize_midisize_7, u8, 8, 10);
register_bit!(reg0_cache_type, l2_assoc_i, 6);
register_bits!(reg0_cache_type, l2cache_line_len_i, u8, 0, 1);
register!(reg1_control, Reg1Control, RW, u32);
register_bit!(reg1_control, l2_enable, 0);
register!(reg1_aux_control, Reg1AuxControl, RW, u32);
register_bit!(reg1_aux_control, early_bresp_en, 30);
register_bit!(reg1_aux_control, instr_prefetch_en, 29);
register_bit!(reg1_aux_control, data_prefetch_en, 28);
register_bit!(reg1_aux_control, nonsec_inte_access_ctrl, 27);
register_bit!(reg1_aux_control, nonsec_lockdown_en, 26);
register_bit!(reg1_aux_control, cache_replace_policy, 25);
register_bits!(reg1_aux_control, force_write_alloc, u8, 23, 24);
register_bit!(reg1_aux_control, shared_attr_override_en, 22);
register_bit!(reg1_aux_control, parity_en, 21);
register_bit!(reg1_aux_control, event_mon_bus_en, 20);
register_bits!(reg1_aux_control, way_size, u8, 17, 19);
register_bit!(reg1_aux_control, associativity, 16);
register_bit!(reg1_aux_control, shared_attr_inva_en, 13);
register_bit!(reg1_aux_control, ex_cache_config, 12);
register_bit!(reg1_aux_control, store_buff_dev_lim_en, 11);
register_bit!(reg1_aux_control, high_pr_so_dev_rd_en, 10);
register_bit!(reg1_aux_control, full_line_zero_enable, 0);
register!(reg1_tag_ram_control, Reg1TagRamControl, RW, u32);
register_bits!(reg1_tag_ram_control, ram_wr_access_lat, u8, 8, 10);
register_bits!(reg1_tag_ram_control, ram_rd_access_lat, u8, 4, 6);
register_bits!(reg1_tag_ram_control, ram_setup_lat, u8, 0, 2);
register!(reg1_data_ram_control, Reg1DataRamControl, RW, u32);
register_bits!(reg1_data_ram_control, ram_wr_access_lat, u8, 8, 10);
register_bits!(reg1_data_ram_control, ram_rd_access_lat, u8, 4, 6);
register_bits!(reg1_data_ram_control, ram_setup_lat, u8, 0, 2);
register!(reg2_ev_counter_ctrl, Reg2EvCounterCtrl, RW, u32);
register_bit!(reg2_ev_counter_ctrl, ev_ctr_en, 0);
register!(reg2_ev_counter1_cfg, Reg2EvCounter1Cfg, RW, u32);
register_bits!(reg2_ev_counter1_cfg, ctr_ev_src, u8, 2, 5);
register_bits!(reg2_ev_counter1_cfg, ev_ctr_intr_gen, u8, 0, 1);
register!(reg2_ev_counter0_cfg, Reg2EvCounter0Cfg, RW, u32);
register_bits!(reg2_ev_counter0_cfg, ctr_ev_src, u8, 2, 5);
register_bits!(reg2_ev_counter0_cfg, ev_ctr_intr_gen, u8, 0, 1);
register!(reg2_int_mask, Reg2IntMask, RW, u32);
register_bit!(reg2_int_mask, decerr, 8);
register_bit!(reg2_int_mask, slverr, 7);
register_bit!(reg2_int_mask, errrd, 6);
register_bit!(reg2_int_mask, errrt, 5);
register_bit!(reg2_int_mask, errwd, 4);
register_bit!(reg2_int_mask, errwt, 3);
register_bit!(reg2_int_mask, parrd, 2);
register_bit!(reg2_int_mask, parrt, 1);
register_bit!(reg2_int_mask, ecntr, 0);
register!(reg2_int_mask_status, Reg2IntMaskStatus, RW, u32);
register_bit!(reg2_int_mask_status, decerr, 8);
register_bit!(reg2_int_mask_status, slverr, 7);
register_bit!(reg2_int_mask_status, errrd, 6);
register_bit!(reg2_int_mask_status, errrt, 5);
register_bit!(reg2_int_mask_status, errwd, 4);
register_bit!(reg2_int_mask_status, errwt, 3);
register_bit!(reg2_int_mask_status, parrd, 2);
register_bit!(reg2_int_mask_status, parrt, 1);
register_bit!(reg2_int_mask_status, ecntr, 0);
register!(reg2_int_raw_status, Reg2IntRawStatus, RW, u32);
register_bit!(reg2_int_raw_status, decerr, 8);
register_bit!(reg2_int_raw_status, slverr, 7);
register_bit!(reg2_int_raw_status, errrd, 6);
register_bit!(reg2_int_raw_status, errrt, 5);
register_bit!(reg2_int_raw_status, errwd, 4);
register_bit!(reg2_int_raw_status, errwt, 3);
register_bit!(reg2_int_raw_status, parrd, 2);
register_bit!(reg2_int_raw_status, parrt, 1);
register_bit!(reg2_int_raw_status, ecntr, 0);
register!(reg2_int_clear, Reg2IntClear, RW, u32, 0);
register_bit!(reg2_int_clear, decerr, 8, WTC);
register_bit!(reg2_int_clear, slverr, 7, WTC);
register_bit!(reg2_int_clear, errrd, 6, WTC);
register_bit!(reg2_int_clear, errrt, 5, WTC);
register_bit!(reg2_int_clear, errwd, 4, WTC);
register_bit!(reg2_int_clear, errwt, 3, WTC);
register_bit!(reg2_int_clear, parrd, 2, WTC);
register_bit!(reg2_int_clear, parrt, 1, WTC);
register_bit!(reg2_int_clear, ecntr, 0, WTC);
register!(reg7_cache_sync, Reg7CacheSync, RW, u32);
register_bit!(reg7_cache_sync, c, 0);
register!(reg7_clean_index, Reg7CleanIndex, RW, u32);
register_bits!(reg7_clean_index, way, u8, 28, 30);
register_bits!(reg7_clean_index, index, u8, 5, 11);
register_bit!(reg7_clean_index, c, 0);
register!(reg7_clean_inv_index, Reg7CleanInvIndex, RW, u32);
register_bits!(reg7_clean_inv_index, way, u8, 28, 30);
register_bits!(reg7_clean_inv_index, index, u8, 5, 11);
register_bit!(reg7_clean_inv_index, c, 0);

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@ -12,6 +12,7 @@ pub mod mmu;
pub mod mutex;
pub mod sync_channel;
pub mod semaphore;
pub mod l2c;
mod uncached;
mod fpu;
pub use uncached::UncachedSlice;