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-rw-r--r--arch/powerpc/boot/4xx.c476
1 files changed, 393 insertions, 83 deletions
diff --git a/arch/powerpc/boot/4xx.c b/arch/powerpc/boot/4xx.c
index ebf9e217612d..758edf1c5815 100644
--- a/arch/powerpc/boot/4xx.c
+++ b/arch/powerpc/boot/4xx.c
@@ -22,16 +22,14 @@
#include "dcr.h"
/* Read the 4xx SDRAM controller to get size of system memory. */
-void ibm4xx_fixup_memsize(void)
+void ibm4xx_sdram_fixup_memsize(void)
{
int i;
unsigned long memsize, bank_config;
memsize = 0;
for (i = 0; i < ARRAY_SIZE(sdram_bxcr); i++) {
- mtdcr(DCRN_SDRAM0_CFGADDR, sdram_bxcr[i]);
- bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
-
+ bank_config = SDRAM0_READ(sdram_bxcr[i]);
if (bank_config & SDRAM_CONFIG_BANK_ENABLE)
memsize += SDRAM_CONFIG_BANK_SIZE(bank_config);
}
@@ -39,6 +37,69 @@ void ibm4xx_fixup_memsize(void)
dt_fixup_memory(0, memsize);
}
+/* Read the 440SPe MQ controller to get size of system memory. */
+#define DCRN_MQ0_B0BAS 0x40
+#define DCRN_MQ0_B1BAS 0x41
+#define DCRN_MQ0_B2BAS 0x42
+#define DCRN_MQ0_B3BAS 0x43
+
+static u64 ibm440spe_decode_bas(u32 bas)
+{
+ u64 base = ((u64)(bas & 0xFFE00000u)) << 2;
+
+ /* open coded because I'm paranoid about invalid values */
+ switch ((bas >> 4) & 0xFFF) {
+ case 0:
+ return 0;
+ case 0xffc:
+ return base + 0x000800000ull;
+ case 0xff8:
+ return base + 0x001000000ull;
+ case 0xff0:
+ return base + 0x002000000ull;
+ case 0xfe0:
+ return base + 0x004000000ull;
+ case 0xfc0:
+ return base + 0x008000000ull;
+ case 0xf80:
+ return base + 0x010000000ull;
+ case 0xf00:
+ return base + 0x020000000ull;
+ case 0xe00:
+ return base + 0x040000000ull;
+ case 0xc00:
+ return base + 0x080000000ull;
+ case 0x800:
+ return base + 0x100000000ull;
+ }
+ printf("Memory BAS value 0x%08x unsupported !\n", bas);
+ return 0;
+}
+
+void ibm440spe_fixup_memsize(void)
+{
+ u64 banktop, memsize = 0;
+
+ /* Ultimately, we should directly construct the memory node
+ * so we are able to handle holes in the memory address space
+ */
+ banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B0BAS));
+ if (banktop > memsize)
+ memsize = banktop;
+ banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B1BAS));
+ if (banktop > memsize)
+ memsize = banktop;
+ banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B2BAS));
+ if (banktop > memsize)
+ memsize = banktop;
+ banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B3BAS));
+ if (banktop > memsize)
+ memsize = banktop;
+
+ dt_fixup_memory(0, memsize);
+}
+
+
/* 4xx DDR1/2 Denali memory controller support */
/* DDR0 registers */
#define DDR0_02 2
@@ -77,19 +138,13 @@ void ibm4xx_fixup_memsize(void)
#define DDR_GET_VAL(val, mask, shift) (((val) >> (shift)) & (mask))
-static inline u32 mfdcr_sdram0(u32 reg)
-{
- mtdcr(DCRN_SDRAM0_CFGADDR, reg);
- return mfdcr(DCRN_SDRAM0_CFGDATA);
-}
-
void ibm4xx_denali_fixup_memsize(void)
{
u32 val, max_cs, max_col, max_row;
u32 cs, col, row, bank, dpath;
unsigned long memsize;
- val = mfdcr_sdram0(DDR0_02);
+ val = SDRAM0_READ(DDR0_02);
if (!DDR_GET_VAL(val, DDR_START, DDR_START_SHIFT))
fatal("DDR controller is not initialized\n");
@@ -99,12 +154,12 @@ void ibm4xx_denali_fixup_memsize(void)
max_row = DDR_GET_VAL(val, DDR_MAX_ROW_REG, DDR_MAX_ROW_REG_SHIFT);
/* get CS value */
- val = mfdcr_sdram0(DDR0_10);
+ val = SDRAM0_READ(DDR0_10);
val = DDR_GET_VAL(val, DDR_CS_MAP, DDR_CS_MAP_SHIFT);
cs = 0;
while (val) {
- if (val && 0x1)
+ if (val & 0x1)
cs++;
val = val >> 1;
}
@@ -115,15 +170,15 @@ void ibm4xx_denali_fixup_memsize(void)
fatal("DDR wrong CS configuration\n");
/* get data path bytes */
- val = mfdcr_sdram0(DDR0_14);
+ val = SDRAM0_READ(DDR0_14);
if (DDR_GET_VAL(val, DDR_REDUC, DDR_REDUC_SHIFT))
dpath = 8; /* 64 bits */
else
dpath = 4; /* 32 bits */
- /* get adress pins (rows) */
- val = mfdcr_sdram0(DDR0_42);
+ /* get address pins (rows) */
+ val = SDRAM0_READ(DDR0_42);
row = DDR_GET_VAL(val, DDR_APIN, DDR_APIN_SHIFT);
if (row > max_row)
@@ -131,7 +186,7 @@ void ibm4xx_denali_fixup_memsize(void)
row = max_row - row;
/* get collomn size and banks */
- val = mfdcr_sdram0(DDR0_43);
+ val = SDRAM0_READ(DDR0_43);
col = DDR_GET_VAL(val, DDR_COL_SZ, DDR_COL_SZ_SHIFT);
if (col > max_col)
@@ -179,13 +234,17 @@ void ibm40x_dbcr_reset(void)
#define EMAC_RESET 0x20000000
void ibm4xx_quiesce_eth(u32 *emac0, u32 *emac1)
{
- /* Quiesce the MAL and EMAC(s) since PIBS/OpenBIOS don't do this for us */
+ /* Quiesce the MAL and EMAC(s) since PIBS/OpenBIOS don't
+ * do this for us
+ */
if (emac0)
*emac0 = EMAC_RESET;
if (emac1)
*emac1 = EMAC_RESET;
mtdcr(DCRN_MAL0_CFG, MAL_RESET);
+ while (mfdcr(DCRN_MAL0_CFG) & MAL_RESET)
+ ; /* loop until reset takes effect */
}
/* Read 4xx EBC bus bridge registers to get mappings of the peripheral
@@ -217,84 +276,335 @@ void ibm4xx_fixup_ebc_ranges(const char *ebc)
setprop(devp, "ranges", ranges, (p - ranges) * sizeof(u32));
}
-#define SPRN_CCR1 0x378
-void ibm440ep_fixup_clocks(unsigned int sysclk, unsigned int ser_clk)
+/* Calculate 440GP clocks */
+void ibm440gp_fixup_clocks(unsigned int sys_clk, unsigned int ser_clk)
{
- u32 cpu, plb, opb, ebc, tb, uart0, m, vco;
- u32 reg;
- u32 fwdva, fwdvb, fbdv, lfbdv, opbdv0, perdv0, spcid0, prbdv0, tmp;
-
- mtdcr(DCRN_CPR0_ADDR, CPR0_PLLD0);
- reg = mfdcr(DCRN_CPR0_DATA);
- tmp = (reg & 0x000F0000) >> 16;
- fwdva = tmp ? tmp : 16;
- tmp = (reg & 0x00000700) >> 8;
- fwdvb = tmp ? tmp : 8;
- tmp = (reg & 0x1F000000) >> 24;
- fbdv = tmp ? tmp : 32;
- lfbdv = (reg & 0x0000007F);
-
- mtdcr(DCRN_CPR0_ADDR, CPR0_OPBD0);
- reg = mfdcr(DCRN_CPR0_DATA);
- tmp = (reg & 0x03000000) >> 24;
- opbdv0 = tmp ? tmp : 4;
-
- mtdcr(DCRN_CPR0_ADDR, CPR0_PERD0);
- reg = mfdcr(DCRN_CPR0_DATA);
- tmp = (reg & 0x07000000) >> 24;
- perdv0 = tmp ? tmp : 8;
-
- mtdcr(DCRN_CPR0_ADDR, CPR0_PRIMBD0);
- reg = mfdcr(DCRN_CPR0_DATA);
- tmp = (reg & 0x07000000) >> 24;
- prbdv0 = tmp ? tmp : 8;
-
- mtdcr(DCRN_CPR0_ADDR, CPR0_SCPID);
- reg = mfdcr(DCRN_CPR0_DATA);
- tmp = (reg & 0x03000000) >> 24;
- spcid0 = tmp ? tmp : 4;
-
- /* Calculate M */
- mtdcr(DCRN_CPR0_ADDR, CPR0_PLLC0);
- reg = mfdcr(DCRN_CPR0_DATA);
- tmp = (reg & 0x03000000) >> 24;
- if (tmp == 0) { /* PLL output */
- tmp = (reg & 0x20000000) >> 29;
- if (!tmp) /* PLLOUTA */
- m = fbdv * lfbdv * fwdva;
+ u32 sys0 = mfdcr(DCRN_CPC0_SYS0);
+ u32 cr0 = mfdcr(DCRN_CPC0_CR0);
+ u32 cpu, plb, opb, ebc, tb, uart0, uart1, m;
+ u32 opdv = CPC0_SYS0_OPDV(sys0);
+ u32 epdv = CPC0_SYS0_EPDV(sys0);
+
+ if (sys0 & CPC0_SYS0_BYPASS) {
+ /* Bypass system PLL */
+ cpu = plb = sys_clk;
+ } else {
+ if (sys0 & CPC0_SYS0_EXTSL)
+ /* PerClk */
+ m = CPC0_SYS0_FWDVB(sys0) * opdv * epdv;
else
- m = fbdv * lfbdv * fwdvb;
+ /* CPU clock */
+ m = CPC0_SYS0_FBDV(sys0) * CPC0_SYS0_FWDVA(sys0);
+ cpu = sys_clk * m / CPC0_SYS0_FWDVA(sys0);
+ plb = sys_clk * m / CPC0_SYS0_FWDVB(sys0);
}
- else if (tmp == 1) /* CPU output */
- m = fbdv * fwdva;
+
+ opb = plb / opdv;
+ ebc = opb / epdv;
+
+ /* FIXME: Check if this is for all 440GP, or just Ebony */
+ if ((mfpvr() & 0xf0000fff) == 0x40000440)
+ /* Rev. B 440GP, use external system clock */
+ tb = sys_clk;
else
- m = perdv0 * opbdv0 * fwdvb;
+ /* Rev. C 440GP, errata force us to use internal clock */
+ tb = cpu;
- vco = (m * sysclk) + (m >> 1);
- cpu = vco / fwdva;
- plb = vco / fwdvb / prbdv0;
- opb = plb / opbdv0;
- ebc = plb / perdv0;
+ if (cr0 & CPC0_CR0_U0EC)
+ /* External UART clock */
+ uart0 = ser_clk;
+ else
+ /* Internal UART clock */
+ uart0 = plb / CPC0_CR0_UDIV(cr0);
+
+ if (cr0 & CPC0_CR0_U1EC)
+ /* External UART clock */
+ uart1 = ser_clk;
+ else
+ /* Internal UART clock */
+ uart1 = plb / CPC0_CR0_UDIV(cr0);
- /* FIXME */
- uart0 = ser_clk;
+ printf("PPC440GP: SysClk = %dMHz (%x)\n\r",
+ (sys_clk + 500000) / 1000000, sys_clk);
+
+ dt_fixup_cpu_clocks(cpu, tb, 0);
+
+ dt_fixup_clock("/plb", plb);
+ dt_fixup_clock("/plb/opb", opb);
+ dt_fixup_clock("/plb/opb/ebc", ebc);
+ dt_fixup_clock("/plb/opb/serial@40000200", uart0);
+ dt_fixup_clock("/plb/opb/serial@40000300", uart1);
+}
+
+#define SPRN_CCR1 0x378
+
+static inline u32 __fix_zero(u32 v, u32 def)
+{
+ return v ? v : def;
+}
+
+static unsigned int __ibm440eplike_fixup_clocks(unsigned int sys_clk,
+ unsigned int tmr_clk,
+ int per_clk_from_opb)
+{
+ /* PLL config */
+ u32 pllc = CPR0_READ(DCRN_CPR0_PLLC);
+ u32 plld = CPR0_READ(DCRN_CPR0_PLLD);
+
+ /* Dividers */
+ u32 fbdv = __fix_zero((plld >> 24) & 0x1f, 32);
+ u32 fwdva = __fix_zero((plld >> 16) & 0xf, 16);
+ u32 fwdvb = __fix_zero((plld >> 8) & 7, 8);
+ u32 lfbdv = __fix_zero(plld & 0x3f, 64);
+ u32 pradv0 = __fix_zero((CPR0_READ(DCRN_CPR0_PRIMAD) >> 24) & 7, 8);
+ u32 prbdv0 = __fix_zero((CPR0_READ(DCRN_CPR0_PRIMBD) >> 24) & 7, 8);
+ u32 opbdv0 = __fix_zero((CPR0_READ(DCRN_CPR0_OPBD) >> 24) & 3, 4);
+ u32 perdv0 = __fix_zero((CPR0_READ(DCRN_CPR0_PERD) >> 24) & 3, 4);
+
+ /* Input clocks for primary dividers */
+ u32 clk_a, clk_b;
+
+ /* Resulting clocks */
+ u32 cpu, plb, opb, ebc, vco;
+
+ /* Timebase */
+ u32 ccr1, tb = tmr_clk;
+
+ if (pllc & 0x40000000) {
+ u32 m;
+
+ /* Feedback path */
+ switch ((pllc >> 24) & 7) {
+ case 0:
+ /* PLLOUTx */
+ m = ((pllc & 0x20000000) ? fwdvb : fwdva) * lfbdv;
+ break;
+ case 1:
+ /* CPU */
+ m = fwdva * pradv0;
+ break;
+ case 5:
+ /* PERClk */
+ m = fwdvb * prbdv0 * opbdv0 * perdv0;
+ break;
+ default:
+ printf("WARNING ! Invalid PLL feedback source !\n");
+ goto bypass;
+ }
+ m *= fbdv;
+ vco = sys_clk * m;
+ clk_a = vco / fwdva;
+ clk_b = vco / fwdvb;
+ } else {
+bypass:
+ /* Bypass system PLL */
+ vco = 0;
+ clk_a = clk_b = sys_clk;
+ }
+
+ cpu = clk_a / pradv0;
+ plb = clk_b / prbdv0;
+ opb = plb / opbdv0;
+ ebc = (per_clk_from_opb ? opb : plb) / perdv0;
/* Figure out timebase. Either CPU or default TmrClk */
- asm volatile (
- "mfspr %0,%1\n"
- :
- "=&r"(reg) : "i"(SPRN_CCR1));
- if (reg & 0x0080)
- tb = 25000000; /* TmrClk is 25MHz */
- else
+ ccr1 = mfspr(SPRN_CCR1);
+
+ /* If passed a 0 tmr_clk, force CPU clock */
+ if (tb == 0) {
+ ccr1 &= ~0x80u;
+ mtspr(SPRN_CCR1, ccr1);
+ }
+ if ((ccr1 & 0x0080) == 0)
tb = cpu;
dt_fixup_cpu_clocks(cpu, tb, 0);
dt_fixup_clock("/plb", plb);
dt_fixup_clock("/plb/opb", opb);
dt_fixup_clock("/plb/opb/ebc", ebc);
+
+ return plb;
+}
+
+static void eplike_fixup_uart_clk(int index, const char *path,
+ unsigned int ser_clk,
+ unsigned int plb_clk)
+{
+ unsigned int sdr;
+ unsigned int clock;
+
+ switch (index) {
+ case 0:
+ sdr = SDR0_READ(DCRN_SDR0_UART0);
+ break;
+ case 1:
+ sdr = SDR0_READ(DCRN_SDR0_UART1);
+ break;
+ case 2:
+ sdr = SDR0_READ(DCRN_SDR0_UART2);
+ break;
+ case 3:
+ sdr = SDR0_READ(DCRN_SDR0_UART3);
+ break;
+ default:
+ return;
+ }
+
+ if (sdr & 0x00800000u)
+ clock = ser_clk;
+ else
+ clock = plb_clk / __fix_zero(sdr & 0xff, 256);
+
+ dt_fixup_clock(path, clock);
+}
+
+void ibm440ep_fixup_clocks(unsigned int sys_clk,
+ unsigned int ser_clk,
+ unsigned int tmr_clk)
+{
+ unsigned int plb_clk = __ibm440eplike_fixup_clocks(sys_clk, tmr_clk, 0);
+
+ /* serial clocks beed fixup based on int/ext */
+ eplike_fixup_uart_clk(0, "/plb/opb/serial@ef600300", ser_clk, plb_clk);
+ eplike_fixup_uart_clk(1, "/plb/opb/serial@ef600400", ser_clk, plb_clk);
+ eplike_fixup_uart_clk(2, "/plb/opb/serial@ef600500", ser_clk, plb_clk);
+ eplike_fixup_uart_clk(3, "/plb/opb/serial@ef600600", ser_clk, plb_clk);
+}
+
+void ibm440gx_fixup_clocks(unsigned int sys_clk,
+ unsigned int ser_clk,
+ unsigned int tmr_clk)
+{
+ unsigned int plb_clk = __ibm440eplike_fixup_clocks(sys_clk, tmr_clk, 1);
+
+ /* serial clocks beed fixup based on int/ext */
+ eplike_fixup_uart_clk(0, "/plb/opb/serial@40000200", ser_clk, plb_clk);
+ eplike_fixup_uart_clk(1, "/plb/opb/serial@40000300", ser_clk, plb_clk);
+}
+
+void ibm440spe_fixup_clocks(unsigned int sys_clk,
+ unsigned int ser_clk,
+ unsigned int tmr_clk)
+{
+ unsigned int plb_clk = __ibm440eplike_fixup_clocks(sys_clk, tmr_clk, 1);
+
+ /* serial clocks beed fixup based on int/ext */
+ eplike_fixup_uart_clk(0, "/plb/opb/serial@10000200", ser_clk, plb_clk);
+ eplike_fixup_uart_clk(1, "/plb/opb/serial@10000300", ser_clk, plb_clk);
+ eplike_fixup_uart_clk(2, "/plb/opb/serial@10000600", ser_clk, plb_clk);
+}
+
+void ibm405gp_fixup_clocks(unsigned int sys_clk, unsigned int ser_clk)
+{
+ u32 pllmr = mfdcr(DCRN_CPC0_PLLMR);
+ u32 cpc0_cr0 = mfdcr(DCRN_405_CPC0_CR0);
+ u32 cpc0_cr1 = mfdcr(DCRN_405_CPC0_CR1);
+ u32 psr = mfdcr(DCRN_405_CPC0_PSR);
+ u32 cpu, plb, opb, ebc, tb, uart0, uart1, m;
+ u32 fwdv, fwdvb, fbdv, cbdv, opdv, epdv, ppdv, udiv;
+
+ fwdv = (8 - ((pllmr & 0xe0000000) >> 29));
+ fbdv = (pllmr & 0x1e000000) >> 25;
+ if (fbdv == 0)
+ fbdv = 16;
+ cbdv = ((pllmr & 0x00060000) >> 17) + 1; /* CPU:PLB */
+ opdv = ((pllmr & 0x00018000) >> 15) + 1; /* PLB:OPB */
+ ppdv = ((pllmr & 0x00001800) >> 13) + 1; /* PLB:PCI */
+ epdv = ((pllmr & 0x00001800) >> 11) + 2; /* PLB:EBC */
+ udiv = ((cpc0_cr0 & 0x3e) >> 1) + 1;
+
+ /* check for 405GPr */
+ if ((mfpvr() & 0xfffffff0) == (0x50910951 & 0xfffffff0)) {
+ fwdvb = 8 - (pllmr & 0x00000007);
+ if (!(psr & 0x00001000)) /* PCI async mode enable == 0 */
+ if (psr & 0x00000020) /* New mode enable */
+ m = fwdvb * 2 * ppdv;
+ else
+ m = fwdvb * cbdv * ppdv;
+ else if (psr & 0x00000020) /* New mode enable */
+ if (psr & 0x00000800) /* PerClk synch mode */
+ m = fwdvb * 2 * epdv;
+ else
+ m = fbdv * fwdv;
+ else if (epdv == fbdv)
+ m = fbdv * cbdv * epdv;
+ else
+ m = fbdv * fwdvb * cbdv;
+
+ cpu = sys_clk * m / fwdv;
+ plb = sys_clk * m / (fwdvb * cbdv);
+ } else {
+ m = fwdv * fbdv * cbdv;
+ cpu = sys_clk * m / fwdv;
+ plb = cpu / cbdv;
+ }
+ opb = plb / opdv;
+ ebc = plb / epdv;
+
+ if (cpc0_cr0 & 0x80)
+ /* uart0 uses the external clock */
+ uart0 = ser_clk;
+ else
+ uart0 = cpu / udiv;
+
+ if (cpc0_cr0 & 0x40)
+ /* uart1 uses the external clock */
+ uart1 = ser_clk;
+ else
+ uart1 = cpu / udiv;
+
+ /* setup the timebase clock to tick at the cpu frequency */
+ cpc0_cr1 = cpc0_cr1 & ~0x00800000;
+ mtdcr(DCRN_405_CPC0_CR1, cpc0_cr1);
+ tb = cpu;
+
+ dt_fixup_cpu_clocks(cpu, tb, 0);
+ dt_fixup_clock("/plb", plb);
+ dt_fixup_clock("/plb/opb", opb);
+ dt_fixup_clock("/plb/ebc", ebc);
+ dt_fixup_clock("/plb/opb/serial@ef600300", uart0);
+ dt_fixup_clock("/plb/opb/serial@ef600400", uart1);
+}
+
+
+void ibm405ep_fixup_clocks(unsigned int sys_clk)
+{
+ u32 pllmr0 = mfdcr(DCRN_CPC0_PLLMR0);
+ u32 pllmr1 = mfdcr(DCRN_CPC0_PLLMR1);
+ u32 cpc0_ucr = mfdcr(DCRN_CPC0_UCR);
+ u32 cpu, plb, opb, ebc, uart0, uart1;
+ u32 fwdva, fwdvb, fbdv, cbdv, opdv, epdv;
+ u32 pllmr0_ccdv, tb, m;
+
+ fwdva = 8 - ((pllmr1 & 0x00070000) >> 16);
+ fwdvb = 8 - ((pllmr1 & 0x00007000) >> 12);
+ fbdv = (pllmr1 & 0x00f00000) >> 20;
+ if (fbdv == 0)
+ fbdv = 16;
+
+ cbdv = ((pllmr0 & 0x00030000) >> 16) + 1; /* CPU:PLB */
+ epdv = ((pllmr0 & 0x00000300) >> 8) + 2; /* PLB:EBC */
+ opdv = ((pllmr0 & 0x00003000) >> 12) + 1; /* PLB:OPB */
+
+ m = fbdv * fwdvb;
+
+ pllmr0_ccdv = ((pllmr0 & 0x00300000) >> 20) + 1;
+ if (pllmr1 & 0x80000000)
+ cpu = sys_clk * m / (fwdva * pllmr0_ccdv);
+ else
+ cpu = sys_clk / pllmr0_ccdv;
+
+ plb = cpu / cbdv;
+ opb = plb / opdv;
+ ebc = plb / epdv;
+ tb = cpu;
+ uart0 = cpu / (cpc0_ucr & 0x0000007f);
+ uart1 = cpu / ((cpc0_ucr & 0x00007f00) >> 8);
+
+ dt_fixup_cpu_clocks(cpu, tb, 0);
+ dt_fixup_clock("/plb", plb);
+ dt_fixup_clock("/plb/opb", opb);
+ dt_fixup_clock("/plb/ebc", ebc);
dt_fixup_clock("/plb/opb/serial@ef600300", uart0);
- dt_fixup_clock("/plb/opb/serial@ef600400", uart0);
- dt_fixup_clock("/plb/opb/serial@ef600500", uart0);
- dt_fixup_clock("/plb/opb/serial@ef600600", uart0);
+ dt_fixup_clock("/plb/opb/serial@ef600400", uart1);
}
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