l2c related changes #76
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@ -2,7 +2,9 @@ use libregister::{register, register_at, register_bit, register_bits, RegisterRW
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use super::asm::dmb;
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use volatile_register::RW;
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pub fn enable_l2_cache() {
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/// enable L2 cache with specific prefetch offset
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/// prefetch offset requires manual tuning, it seems that 8 is good for ZC706 current settings
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pub fn enable_l2_cache(offset: u8) {
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dmb();
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let regs = RegisterBlock::new();
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// disable L2 cache
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@ -14,6 +16,7 @@ pub fn enable_l2_cache() {
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.double_linefill_en(true)
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.incr_double_linefill_en(true)
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.pref_drop_en(true)
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.prefetch_offset(offset)
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);
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regs.reg1_aux_control.modify(|_, w| {
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w.early_bresp_en(true)
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@ -326,3 +329,5 @@ register_bit!(reg15_prefetch_ctrl, instr_prefetch_en, 29);
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register_bit!(reg15_prefetch_ctrl, data_prefetch_en, 28);
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register_bit!(reg15_prefetch_ctrl, pref_drop_en, 24);
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register_bit!(reg15_prefetch_ctrl, incr_double_linefill_en, 23);
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register_bits!(reg15_prefetch_ctrl, prefetch_offset, u8, 0, 4);
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@ -173,7 +173,7 @@ impl RegisterRW for ACTLR {
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impl ACTLR {
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pub fn enable_smp(&mut self) {
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self.modify(|_, w| w.smp(true).fw(true));
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self.modify(|_, w| w.smp(true).fw(true).alloc_one_way(true));
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}
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pub fn enable_prefetch(&mut self) {
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@ -20,7 +20,6 @@ use libconfig::{bootgen, sd_reader, Config};
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use libcortex_a9::{
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asm::{dsb, isb},
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cache::{bpiall, dcciall, iciallu},
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l2c::enable_l2_cache,
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};
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use libregister::RegisterR;
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use libsupport_zynq::ram;
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@ -80,7 +79,6 @@ pub fn main_core0() {
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"#
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);
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info!("Simple Zynq Loader starting...");
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enable_l2_cache();
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const CPU_FREQ: u32 = 800_000_000;
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